Cohen, F. R.; Cohen, R. L.; Mann, B. M.; Milgram, R. J. The topology of rational functions and divisors of surfaces. (English) Zbl 0741.55005 Acta Math. 166, No. 3-4, 163-221 (1991). Reviewer: P.J.Kahn (Ithaca) MSC: 55P42 55P99 PDFBibTeX XMLCite \textit{F. R. Cohen} et al., Acta Math. 166, No. 3--4, 163--221 (1991; Zbl 0741.55005) Full Text: DOI
Pirashvili, T. I. \(H^ 3\) and models for homotopy theory. (Russian) Zbl 0881.55017 Tr. Tbilis. Mat. Inst. Razmadze 94, 73-85 (1991). Reviewer: A.Dranishnikov (Gainesville) MSC: 55U35 55M30 18A99 PDFBibTeX XMLCite \textit{T. I. Pirashvili}, Proc. A. Razmadze Math. Inst. 94, 73--85 (1991; Zbl 0881.55017)
Barragy, E.; Carey, G. F. Bifurcation detection using the Lanczos method and imbedded subspaces. (English) Zbl 0753.65085 IMPACT Comput. Sci. Eng. 3, No. 1, 76-92 (1991). MSC: 65N25 65H20 65N30 65N55 35P30 35B32 PDFBibTeX XMLCite \textit{E. Barragy} and \textit{G. F. Carey}, IMPACT Comput. Sci. Eng. 3, No. 1, 76--92 (1991; Zbl 0753.65085) Full Text: DOI
Rybicki, Sławomir \(\mathbb{Z}{}_ 2\)-equivariant James construction. (English) Zbl 0763.55009 Bull. Pol. Acad. Sci., Math. 39, No. 1-2, 83-90 (1991). MSC: 55P91 PDFBibTeX XMLCite \textit{S. Rybicki}, Bull. Pol. Acad. Sci., Math. 39, No. 1--2, 83--90 (1991; Zbl 0763.55009)
Kwasik, Sławomir; Schultz, Reinhard Topological pseudofree actions on spheres. (English) Zbl 0737.57016 Math. Proc. Camb. Philos. Soc. 109, No. 3, 433-449 (1991). Reviewer: R.Schwänzl (Osnabrück) MSC: 57S25 57S17 PDFBibTeX XMLCite \textit{S. Kwasik} and \textit{R. Schultz}, Math. Proc. Camb. Philos. Soc. 109, No. 3, 433--449 (1991; Zbl 0737.57016) Full Text: DOI
Zhang, Detong A modification of the homotopy method for solving generalized eigenvalue problem. (English) Zbl 0802.65049 Northeast. Math. J. 7, No. 2, 176-180 (1991). Reviewer: S.Grzegórski (Lublin) MSC: 65F15 65H20 PDFBibTeX XMLCite \textit{D. Zhang}, Northeast. Math. J. 7, No. 2, 176--180 (1991; Zbl 0802.65049)
Ding, Jiu; Li, Tien-Yien A polynomial-time predictor-corrector algorithm for a class of linear complementarity problems. (English) Zbl 0752.90079 SIAM J. Optim. 1, No. 1, 83-92 (1991). MSC: 90C33 PDFBibTeX XMLCite \textit{J. Ding} and \textit{T.-Y. Li}, SIAM J. Optim. 1, No. 1, 83--92 (1991; Zbl 0752.90079) Full Text: DOI
Imaoka, Mitsunori \(\mu\)-elements in \(S^ 1\)-transfer images. (English) Zbl 0759.55012 Osaka J. Math. 28, No. 4, 975-984 (1991). Reviewer: K.Knapp (Wuppertal) MSC: 55R12 55P42 55Q45 55T15 PDFBibTeX XMLCite \textit{M. Imaoka}, Osaka J. Math. 28, No. 4, 975--984 (1991; Zbl 0759.55012)
Ushitaki, Fumihiro \(SK_ 1(\mathbb{Z}[G])\) of finite solvable groups which act linearly and freely on spheres. (English) Zbl 0741.19002 Osaka J. Math. 28, No. 1, 117-127 (1991). Reviewer: C.B.Thomas (Cambridge) MSC: 19B28 57Q10 57S25 PDFBibTeX XMLCite \textit{F. Ushitaki}, Osaka J. Math. 28, No. 1, 117--127 (1991; Zbl 0741.19002)
Greenberg, Peter; Sergiescu, Vlad An acyclic extension of the braid group. (English) Zbl 0736.20020 Comment. Math. Helv. 66, No. 1, 109-138 (1991). Reviewer: C.-H.Sah (Stony Brook) MSC: 20F36 57Q45 58D05 55R35 20E22 57R50 20J05 PDFBibTeX XMLCite \textit{P. Greenberg} and \textit{V. Sergiescu}, Comment. Math. Helv. 66, No. 1, 109--138 (1991; Zbl 0736.20020) Full Text: DOI EuDML
Ye, Rugang On the existence of area-minimizing surfaces with free boundary. (English) Zbl 0737.53057 Math. Z. 206, No. 3, 321-331 (1991). Reviewer: M.Grüter (Saarbrücken) MSC: 53C42 49Q05 PDFBibTeX XMLCite \textit{R. Ye}, Math. Z. 206, No. 3, 321--331 (1991; Zbl 0737.53057) Full Text: DOI EuDML
Lin, Wen-Hsiung Indecomposability of the Stiefel manifolds \(V_{m,k}\). (English) Zbl 0736.57021 Topology 30, No. 2, 301-313 (1991). Reviewer: W.End (Heidelberg) MSC: 57T20 55P10 55S25 PDFBibTeX XMLCite \textit{W.-H. Lin}, Topology 30, No. 2, 301--313 (1991; Zbl 0736.57021) Full Text: DOI
Carlsson, Gunnar Equivariant stable homotopy and Sullivan’s conjecture. (English) Zbl 0736.55008 Invent. Math. 103, No. 3, 497-525 (1991). Reviewer: R.Schwänzl (Osnabrück) MSC: 55P60 55P91 55Q91 55R35 55Q55 PDFBibTeX XMLCite \textit{G. Carlsson}, Invent. Math. 103, No. 3, 497--525 (1991; Zbl 0736.55008) Full Text: DOI EuDML
Félix, Y.; Thomas, J. C.; Vigué-Poirrier, M. Free loop spaces of finite complexes have infinite category. (English) Zbl 0746.55007 Proc. Am. Math. Soc. 111, No. 3, 869-875 (1991). Reviewer: J.McCleary (Poughkeepsie) MSC: 55M30 55P62 55P35 PDFBibTeX XMLCite \textit{Y. Félix} et al., Proc. Am. Math. Soc. 111, No. 3, 869--875 (1991; Zbl 0746.55007) Full Text: DOI
Dydak, Jerzy; Nowak, Slawomir Strong shape for topological spaces. (English) Zbl 0754.55009 Trans. Am. Math. Soc. 323, No. 2, 765-796 (1991). Reviewer: J.Segal (Seattle) MSC: 55P55 54C55 PDFBibTeX XMLCite \textit{J. Dydak} and \textit{S. Nowak}, Trans. Am. Math. Soc. 323, No. 2, 765--796 (1991; Zbl 0754.55009) Full Text: DOI
Latour, François Transversales lagrangiennes, périodicité de Bott et formes génératrices pour une immersion lagrangienne dans un cotangent. (Lagrangian transversals, Bott periodicity and generator forms for a Lagrangian immersion in a cotangent). (French) Zbl 0742.55009 Ann. Sci. Éc. Norm. Supér. (4) 24, No. 1, 3-55 (1991). Reviewer: W.Singhof (Düsseldorf) MSC: 55R45 53C15 PDFBibTeX XMLCite \textit{F. Latour}, Ann. Sci. Éc. Norm. Supér. (4) 24, No. 1, 3--55 (1991; Zbl 0742.55009) Full Text: DOI Numdam EuDML
Thévenaz, J.; Webb, P. J. Homotopy equivalence of posets with a group action. (English) Zbl 0752.05059 J. Comb. Theory, Ser. A 56, No. 2, 173-181 (1991). Reviewer: P.Vincke (Brussels) MSC: 05E25 06A07 PDFBibTeX XMLCite \textit{J. Thévenaz} and \textit{P. J. Webb}, J. Comb. Theory, Ser. A 56, No. 2, 173--181 (1991; Zbl 0752.05059) Full Text: DOI
Zabrodsky, Alex On spaces of functions between classifying spaces. (English) Zbl 0778.55006 Isr. J. Math. 76, No. 1-2, 1-26 (1991). Reviewer: H.M.Unsöld (Berlin) MSC: 55R35 PDFBibTeX XMLCite \textit{A. Zabrodsky}, Isr. J. Math. 76, No. 1--2, 1--26 (1991; Zbl 0778.55006) Full Text: DOI
Hillman, Jonathan A. On 4-manifolds homotopy equivalent to circle bundles over 3-manifolds. (English) Zbl 0767.57018 Isr. J. Math. 75, No. 2-3, 277-287 (1991). Reviewer: T.Lawson (New Orleans) MSC: 57R22 57N13 57P10 57N10 PDFBibTeX XMLCite \textit{J. A. Hillman}, Isr. J. Math. 75, No. 2--3, 277--287 (1991; Zbl 0767.57018) Full Text: DOI
Gompf, Robert E. On Cappell-Shaneson 4-spheres. (English) Zbl 0783.57016 Topology Appl. 38, No. 2, 123-136 (1991). Reviewer: T.Lawson (New Orleans) MSC: 57R60 57M99 57Q25 PDFBibTeX XMLCite \textit{R. E. Gompf}, Topology Appl. 38, No. 2, 123--136 (1991; Zbl 0783.57016) Full Text: DOI
Das, Phullendu \(T\)-fuzzy subquasigroups. (English) Zbl 0828.20077 Ganit 11, No. 1-2, 7-18 (1991). Reviewer: P.Das (Santiniketan) MSC: 20N25 20N05 PDFBibTeX XMLCite \textit{P. Das}, Ganit 11, No. 1--2, 7--18 (1991; Zbl 0828.20077)
Friedlander, Eric M. Algebraic cycles, Chow varieties, and Lawson homology. (English) Zbl 0754.14011 Compos. Math. 77, No. 1, 55-93 (1991). Reviewer: S.Xambó-Descamps (Madrid) MSC: 14F99 14C05 14C25 PDFBibTeX XMLCite \textit{E. M. Friedlander}, Compos. Math. 77, No. 1, 55--93 (1991; Zbl 0754.14011) Full Text: Numdam EuDML
Happel, Dieter On Gorenstein algebras. (English) Zbl 0759.16007 Representation theory of finite groups and finite-dimensional algebras, Proc. Conf., Bielefeld/Ger. 1991, Prog. Math. 95, 389-404 (1991). Reviewer: W.Müller (Bayreuth) MSC: 16G70 16E10 16G50 16P10 16D90 PDFBibTeX XMLCite \textit{D. Happel}, Prog. Math. 95, 389--404 (1991; Zbl 0759.16007)
Kulikov, Vik S. On the fundamental group of the complement of a hypersurface in \(\mathbb{C}^ n\). (English) Zbl 0802.14008 Algebraic geometry, Proc. US-USSR Symp., Chicago/IL (USA) 1989, Lect. Notes Math. 1479, 122-130 (1991). MSC: 14F35 14J70 14H45 PDFBibTeX XMLCite \textit{V. S. Kulikov}, Lect. Notes Math. 1479, 122--130 (1991; Zbl 0802.14008)
Soriano Arbizu, J. M. A triangulation with continuous refinement of mesh. (Spanish. English summary) Zbl 0742.65040 Numerical analysis, computer science and mathematical physics, Proc. 15th Port.-Span. Meet. Math., Évora/Port. 1990, Vol. V, 167-172 (1991). MSC: 65H10 55M20 65H20 PDFBibTeX XMLCite \textit{J. M. Soriano Arbizu}, in: Análise numérica, computação e física. Actas de XV jornadas luso-espanholas de matemática, 3-7 de setembro, 1990, Vol. V. Évora (Portugal): Universidade de Évora. 167--172 (1991; Zbl 0742.65040)
Simpson, Carlos T. The ubiquity of variations of Hodge structure. (English) Zbl 0770.14014 Complex geometry and Lie theory, Proc. Symp., Sundance/UT (USA) 1989, Proc. Symp. Pure Math. 53, 329-348 (1991). Reviewer: A.Buium (Bucureşti) MSC: 14F35 14D07 14F05 32G20 14C30 PDFBibTeX XMLCite \textit{C. T. Simpson}, Proc. Symp. Pure Math. 53, 329--348 (1991; Zbl 0770.14014)
Farrell, F. Thomas; Jones, Lowell E. Rigidity in geometry and topology. (English) Zbl 0745.57008 Proc. Int. Congr. Math., Kyoto/Japan 1990, Vol. I, 653-663 (1991). Reviewer: M.Craioveanu (Timişoara) MSC: 57R19 57R67 55P10 57R20 53C20 PDFBibTeX XMLCite \textit{F. T. Farrell} and \textit{L. E. Jones}, in: Proceedings of the international congress of mathematicians (ICM), August 21--29, 1990, Kyoto, Japan. Volume I. Tokyo etc.: Springer-Verlag. 653--663 (1991; Zbl 0745.57008)
Goodwillie, Thomas G. The differential calculus of homotopy functors. (English) Zbl 0759.55011 Proc. Int. Congr. Math., Kyoto/Japan 1990, Vol. I, 621-630 (1991). Reviewer: R.Vogt (Osnabrück) MSC: 55P99 19D10 PDFBibTeX XMLCite \textit{T. G. Goodwillie}, in: Proceedings of the international congress of mathematicians (ICM), August 21--29, 1990, Kyoto, Japan. Volume I. Tokyo etc.: Springer-Verlag. 621--630 (1991; Zbl 0759.55011)
Uhlenbeck, Karen Applications of nonlinear analysis in topology. (English) Zbl 0753.53001 Proc. Int. Congr. Math., Kyoto/Japan 1990, Vol. I, 261-279 (1991). Reviewer: K.Horneffer (Bremen) MSC: 53-02 57-02 58-02 53C25 57N13 58E12 53C42 57R60 PDFBibTeX XMLCite \textit{K. Uhlenbeck}, in: Proceedings of the international congress of mathematicians (ICM), August 21--29, 1990, Kyoto, Japan. Volume I. Tokyo etc.: Springer-Verlag. 261--279 (1991; Zbl 0753.53001)
Phillips, N. C. Five problems on operator algebras. (English) Zbl 0749.46034 Selfadjoint and nonselfadjoint operator algebras and operator theory, Proc. NSF/CBMS Reg. Conf., Fort Worth/TX (USA) 1990, Contemp. Math. 120, 133-138 (1991). Reviewer: G.A.Elliott (Toronto) MSC: 46L05 19L47 46L80 46K99 55P91 46M20 46M40 55N91 57S10 46L55 PDFBibTeX XMLCite \textit{N. C. Phillips}, Contemp. Math. 120, 133--138 (1991; Zbl 0749.46034)
Mayer, Meinhard E. From Poisson groupoids to quantum groupoids and back. (English) Zbl 0764.22002 Differential geometric methods in theoretical physics, Proc. 19th Int. Conf., Rapallo/Italy 1990, Lect. Notes Phys. 375, 143-154 (1991). Reviewer: A.V.Aminova (Kazan’) MSC: 22A22 37J99 57T05 17B35 PDFBibTeX XMLCite \textit{M. E. Mayer}, Lect. Notes Phys. 375, 143--154 (1991; Zbl 0764.22002)
Le Potier, Joseph Higgs fibre bundles and local systems. (Fibrés de Higgs et systèmes locaux.) (French) Zbl 0762.14011 Séminaire Bourbaki, Vol. 1990/91, Exp. No. 737, Astérisque 201-203, 221-268 (1991). Reviewer: Vo Van Tan (Boston) MSC: 14F05 14F35 PDFBibTeX XMLCite \textit{J. Le Potier}, Astérisque 201--203, 221--268 (1991; Zbl 0762.14011) Full Text: Numdam EuDML
Klinkhamer, F. R. Another look at the \(\mathrm{SU}(2)\) anomaly. (English) Zbl 1332.81222 Phys. Lett., B 256, No. 1, 41-42 (1991). MSC: 81T50 55Q52 53C80 PDFBibTeX XMLCite \textit{F. R. Klinkhamer}, Phys. Lett., B 256, No. 1, 41--42 (1991; Zbl 1332.81222) Full Text: DOI
Irani, Kashmira M.; Kamat, Manohar P.; Ribbens, Calvin J.; Walker, Homer F.; Watson, Layne T. Experiments with conjugate gradient algorithms for homotopy curve tracking. (English) Zbl 0757.65057 SIAM J. Optim. 1, No. 2, 222-251 (1991). Reviewer: Wang Zeke (Guangzhou) MSC: 65H10 65H20 PDFBibTeX XMLCite \textit{K. M. Irani} et al., SIAM J. Optim. 1, No. 2, 222--251 (1991; Zbl 0757.65057) Full Text: DOI
Yang, Bing; Gao, Lin An efficient implementation of Merril’s method for sparse of partially separable systems of nonlinear equations. (English) Zbl 0754.65048 SIAM J. Optim. 1, No. 2, 206-221 (1991). Reviewer: E.L.Allgower (Fort Collins) MSC: 65H20 65K05 90C30 58C30 PDFBibTeX XMLCite \textit{B. Yang} and \textit{L. Gao}, SIAM J. Optim. 1, No. 2, 206--221 (1991; Zbl 0754.65048) Full Text: DOI
Dai, Y.; Van der Laan, G.; Talman, A. J. J.; Yamamoto, Y. A simplicial algorithm for the nonlinear stationary point problem on an unbounded polyhedron. (English) Zbl 0754.90066 SIAM J. Optim. 1, No. 2, 151-165 (1991). MSC: 90C99 65H20 52A20 90-08 PDFBibTeX XMLCite \textit{Y. Dai} et al., SIAM J. Optim. 1, No. 2, 151--165 (1991; Zbl 0754.90066) Full Text: DOI Link
Nazareth, J. L. The homotopy principle and algorithms for linear programming. (English) Zbl 0757.90053 SIAM J. Optim. 1, No. 3, 316-332 (1991). MSC: 90C05 65H20 PDFBibTeX XMLCite \textit{J. L. Nazareth}, SIAM J. Optim. 1, No. 3, 316--332 (1991; Zbl 0757.90053) Full Text: DOI
Kevlishvili, B. J.; Lantadze, G. L. On a generalization of the Vietoris-Begle theorem. (English) Zbl 0776.55005 Soobshch. Akad. Nauk Gruz. SSR 142, No. 2, 281-283 (1991). Reviewer: Yu. Zelinskij (Kyïv) MSC: 55P15 55N10 PDFBibTeX XMLCite \textit{B. J. Kevlishvili} and \textit{G. L. Lantadze}, Soobshch. Akad. Nauk Gruz. SSR 142, No. 2, 281--283 (1991; Zbl 0776.55005)
Shimomura, Katsumi A spectrum whose \(BP_ *\)-homology is \((BP_ */{}I_ 5)[t_ 1]\). (English) Zbl 0757.55010 Hiroshima Math. J. 21, No. 3, 587-595 (1991). Reviewer: W.Singhof (Düsseldorf) MSC: 55P42 55N22 PDFBibTeX XMLCite \textit{K. Shimomura}, Hiroshima Math. J. 21, No. 3, 587--595 (1991; Zbl 0757.55010)
Hu, Bizhong A vanishing result for Whitehead groups. (English) Zbl 0751.57011 Chin. Sci. Bull. 36, No. 22, 1857-1858 (1991). MSC: 57Q10 PDFBibTeX XMLCite \textit{B. Hu}, Chin. Sci. Bull. 36, No. 22, 1857--1858 (1991; Zbl 0751.57011)
Lu, Wenzhao A topological invariant of Riemannian manifold. (English) Zbl 0758.55005 J. Nanjing Univ., Math. Biq. 8, No. 2, 103-108 (1991). Reviewer: D.Motreanu (Iaşi) MSC: 55P15 58E05 57R57 PDFBibTeX XMLCite \textit{W. Lu}, J. Nanjing Univ., Math. Biq. 8, No. 2, 103--108 (1991; Zbl 0758.55005)
Casacuberta, Carles The behaviour of homology in the localization of finite groups. (English) Zbl 0777.20018 Can. Math. Bull. 34, No. 3, 311-320 (1991). Reviewer: U.Stammbach (Zürich) MSC: 20J05 55P60 20D15 PDFBibTeX XMLCite \textit{C. Casacuberta}, Can. Math. Bull. 34, No. 3, 311--320 (1991; Zbl 0777.20018) Full Text: DOI
Arai, Asao A general class of infinite dimensional Dirac operators and related aspects. (English) Zbl 0799.58005 Koshi, Shozo (ed.), Functional analysis and related topics. Proceedings of the international symposium, held at Hokkaido University, Sapporo, Japan, August 31 - September 4, 1990. River Edge, NJ: World Scientific Publishing Co., Inc. 85-98 (1991). MSC: 58B05 58A12 PDFBibTeX XMLCite \textit{A. Arai}, in: Functional analysis and related topics. Proceedings of the international symposium, held at Hokkaido University, Sapporo, Japan, August 31 - September 4, 1990. River Edge, NJ: World Scientific Publishing Co., Inc.. 85--98 (1991; Zbl 0799.58005)
Hofmann, Karl H.; Strambach, Karl Idempotent multiplications on surfaces and aspherical spaces. (English) Zbl 0801.57026 Rocky Mt. J. Math. 21, No. 4, 1279-1315 (1991). MSC: 57T99 57N05 55P45 PDFBibTeX XMLCite \textit{K. H. Hofmann} and \textit{K. Strambach}, Rocky Mt. J. Math. 21, No. 4, 1279--1315 (1991; Zbl 0801.57026) Full Text: DOI
Mukai, Juno On the attaching map in the Stiefel manifold of 2-frames. (English) Zbl 0757.55013 Math. J. Okayama Univ. 33, 177-188 (1991). Reviewer: Y.Nomura (Hyogo) MSC: 55Q52 55Q40 55Q50 PDFBibTeX XMLCite \textit{J. Mukai}, Math. J. Okayama Univ. 33, 177--188 (1991; Zbl 0757.55013)
Iwase, Norio; Maruyama, Ken-ichi; Oka, Shichiro A note on \(\mathcal E(\mathbb{H}{}{P^ n})\) for \(n\leq{}4\). (English) Zbl 0757.55008 Math. J. Okayama Univ. 33, 163-176 (1991). Reviewer: Y.Nomura (Hyogo) MSC: 55P10 55Q05 55Q40 PDFBibTeX XMLCite \textit{N. Iwase} et al., Math. J. Okayama Univ. 33, 163--176 (1991; Zbl 0757.55008)
Chaves, Lucas M.; Rigas, A. On a conjugate orbit of \(G_ 2\). (English) Zbl 0753.57022 Math. J. Okayama Univ. 33, 155-161 (1991). MSC: 57T20 57S15 PDFBibTeX XMLCite \textit{L. M. Chaves} and \textit{A. Rigas}, Math. J. Okayama Univ. 33, 155--161 (1991; Zbl 0753.57022)
Rothenberg, Mel; Triantafillou, Georgia On the classification of \(G\)-manifolds up to finite ambiguity. (English) Zbl 0758.57022 Commun. Pure Appl. Math. 44, No. 7, 761-788 (1991). Reviewer: D.Tanré (Villeneuve d’Ascq) MSC: 57S17 57Q10 55P62 55P91 55N91 55R91 PDFBibTeX XMLCite \textit{M. Rothenberg} and \textit{G. Triantafillou}, Commun. Pure Appl. Math. 44, No. 7, 761--788 (1991; Zbl 0758.57022) Full Text: DOI
Piacenza, Robert J. Homotopy theory of diagrams and \(CW\)-complexes over a category. (English) Zbl 0758.55015 Can. J. Math. 43, No. 4, 814-824 (1991). Reviewer: K.H.Kamps (Hagen) MSC: 55U35 PDFBibTeX XMLCite \textit{R. J. Piacenza}, Can. J. Math. 43, No. 4, 814--824 (1991; Zbl 0758.55015) Full Text: DOI
Erbe, L. H.; Gȩba, K.; Krawcewicz, W. Equivariant fixed point index and the period-doubling cascades. (English) Zbl 0747.55008 Can. J. Math. 43, No. 4, 738-747 (1991). MSC: 55P91 58C30 PDFBibTeX XMLCite \textit{L. H. Erbe} et al., Can. J. Math. 43, No. 4, 738--747 (1991; Zbl 0747.55008) Full Text: DOI
Duzaar, Frank; Fuchs, Martin Existence and regularity of functions which minimize certain energies in homotopy classes of mappings. (English) Zbl 0771.49016 Asymptotic Anal. 5, No. 2, 129-144 (1991). MSC: 49Q20 58E20 55P99 PDFBibTeX XMLCite \textit{F. Duzaar} and \textit{M. Fuchs}, Asymptotic Anal. 5, No. 2, 129--144 (1991; Zbl 0771.49016)
Eda, Katsuya; Sakai, Katsuro A factor of singular homology. (English) Zbl 0760.55003 Tsukuba J. Math. 15, No. 2, 351-387 (1991). MSC: 55N10 PDFBibTeX XMLCite \textit{K. Eda} and \textit{K. Sakai}, Tsukuba J. Math. 15, No. 2, 351--387 (1991; Zbl 0760.55003) Full Text: DOI
Félix, Yves; Halperin, Stephen; Thomas, Jean-Claude Lie algebras of polynomial growth. (English) Zbl 0755.57019 J. Lond. Math. Soc., II. Ser. 43, No. 3, 556-566 (1991). Reviewer: J.F.Oprea (Cleveland) MSC: 57T05 57T25 PDFBibTeX XMLCite \textit{Y. Félix} et al., J. Lond. Math. Soc., II. Ser. 43, No. 3, 556--566 (1991; Zbl 0755.57019) Full Text: DOI
Félix, Yves; Halperin, Stephen; Thomas, Jean-Claude Elliptic Hopf algebras. (English) Zbl 0755.57018 J. Lond. Math. Soc., II. Ser. 43, No. 3, 545-555 (1991). Reviewer: J.F.Oprea (Cleveland) MSC: 57T05 57T25 PDFBibTeX XMLCite \textit{Y. Félix} et al., J. Lond. Math. Soc., II. Ser. 43, No. 3, 545--555 (1991; Zbl 0755.57018) Full Text: DOI
Davis, Donald M. The \(v_ 1\)-periodic homotopy groups of SU\((n)\) at odd primes. (English) Zbl 0760.55013 J. Lond. Math. Soc., II. Ser. 43, No. 3, 529-544 (1991). Reviewer: M.Mimura (Okayama) MSC: 55Q52 PDFBibTeX XMLCite \textit{D. M. Davis}, J. Lond. Math. Soc., II. Ser. 43, No. 3, 529--544 (1991; Zbl 0760.55013) Full Text: DOI
Cohen, Ralph L.; Shimamoto, Don H. Rational functions, labelled configurations, and Hilbert schemes. (English) Zbl 0756.55005 J. Lond. Math. Soc., II. Ser. 43, No. 3, 509-528 (1991). Reviewer: I.Pop (Iaşi) MSC: 55P35 PDFBibTeX XMLCite \textit{R. L. Cohen} and \textit{D. H. Shimamoto}, J. Lond. Math. Soc., II. Ser. 43, No. 3, 509--528 (1991; Zbl 0756.55005) Full Text: DOI
Heller, Alex Relative homotopy. (English) Zbl 0759.55016 J. Lond. Math. Soc., II. Ser. 44, No. 3, 537-552 (1991). Reviewer: K.H.Kamps (Hagen) MSC: 55U35 55P99 PDFBibTeX XMLCite \textit{A. Heller}, J. Lond. Math. Soc., II. Ser. 44, No. 3, 537--552 (1991; Zbl 0759.55016) Full Text: DOI
Watson, Layne T.; Wang, C.-Y. Large deformations of rotating polygonal space structures. (English) Zbl 0749.70020 Comput. Math. Appl. 22, No. 9, 51-59 (1991). MSC: 70M20 74H45 PDFBibTeX XMLCite \textit{L. T. Watson} and \textit{C. Y. Wang}, Comput. Math. Appl. 22, No. 9, 51--59 (1991; Zbl 0749.70020) Full Text: DOI
Cenkl, B.; Hector, G.; Saralegi, M. Tame intersection cohomology. (English) Zbl 0756.55004 Rend. Mat. Appl., VII. Ser. 11, No. 4, 931-944 (1991). Reviewer: D.Tanré (Villeneuve d’Ascq) MSC: 55N35 57N80 55P60 PDFBibTeX XMLCite \textit{B. Cenkl} et al., Rend. Mat. Appl., VII. Ser. 11, No. 4, 931--944 (1991; Zbl 0756.55004)
Mackrodt, Christof Representation forms for metacyclic groups. (English) Zbl 0760.57020 Manuscr. Math. 73, No. 3, 261-287 (1991). Reviewer: C.T.C.Wall (Liverpool) MSC: 57S25 57R67 55P91 57S17 PDFBibTeX XMLCite \textit{C. Mackrodt}, Manuscr. Math. 73, No. 3, 261--287 (1991; Zbl 0760.57020) Full Text: DOI EuDML
Svensson, Jan-Alve Equivariant Eilenberg-MacLane spaces of type 1. (English) Zbl 0752.55007 Math. Scand. 68, No. 1, 19-26 (1991). Reviewer: G.Peschke (Edmonton) MSC: 55P91 PDFBibTeX XMLCite \textit{J.-A. Svensson}, Math. Scand. 68, No. 1, 19--26 (1991; Zbl 0752.55007) Full Text: DOI EuDML
Henn, Hans-Werner Finiteness properties of injective resolutions of certain unstable modules over the Steenrod algebra and applications. (English) Zbl 0751.55016 Math. Ann. 291, No. 2, 191-203 (1991). Reviewer: D.Davis (Bethlehem) MSC: 55S10 55P15 PDFBibTeX XMLCite \textit{H.-W. Henn}, Math. Ann. 291, No. 2, 191--203 (1991; Zbl 0751.55016) Full Text: DOI EuDML
Arai, Asao; Mitoma, Itaru De Rham-Hodge-Kodaira decomposition in \(\infty\)-dimensions. (English) Zbl 0762.58004 Math. Ann. 291, No. 1, 51-73 (1991). Reviewer: Y.Asoo (Okayama) MSC: 58A12 58B05 60H99 PDFBibTeX XMLCite \textit{A. Arai} and \textit{I. Mitoma}, Math. Ann. 291, No. 1, 51--73 (1991; Zbl 0762.58004) Full Text: DOI EuDML
Botvinnik, B. I. Geometric properties of the Adams-Novikov spectral sequence. (Russian) Zbl 0805.55004 Tr. Semin. Vektorn. Tenzorn. Anal. 24, 23-36 (1991). Reviewer: I.Pop (Iaşi) MSC: 55N22 57R90 55P42 55N20 PDFBibTeX XMLCite \textit{B. I. Botvinnik}, Tr. Semin. Vektorn. Tenzorn. Anal. 24, 23--36 (1991; Zbl 0805.55004)
Boileau, Michel; Otal, Jean-Pierre Heegaard splittings and homeotopy groups of small Seifert fibre spaces. (Scindements de Heegaard et groupe des homéotopies des petites variétés de Seifert.) (French) Zbl 0752.57006 Invent. Math. 106, No. 1, 85-107 (1991). Reviewer: B.Zimmermann (Trieste) MSC: 57N10 57R52 PDFBibTeX XMLCite \textit{M. Boileau} and \textit{J.-P. Otal}, Invent. Math. 106, No. 1, 85--107 (1991; Zbl 0752.57006) Full Text: DOI EuDML
Iriye, Kouyemon; Morisugi, Kaoru On the factorization of the Whitehead product \([\iota_{2n+1},\iota_{2n+1}]\). (English) Zbl 0749.55004 Osaka J. Math. 28, No. 3, 683-696 (1991). Reviewer: M.Mimura (Okayama) MSC: 55Q15 PDFBibTeX XMLCite \textit{K. Iriye} and \textit{K. Morisugi}, Osaka J. Math. 28, No. 3, 683--696 (1991; Zbl 0749.55004)
Morris, Sidney A.; Nyikos, Peter J. Sudden cardiac arrest and a problem in topology. (English) Zbl 0747.92016 J. Aust. Math. Soc., Ser. B 33, No. 2, 123-132 (1991). MSC: 92C30 92-01 54-01 PDFBibTeX XMLCite \textit{S. A. Morris} and \textit{P. J. Nyikos}, J. Aust. Math. Soc., Ser. B 33, No. 2, 123--132 (1991; Zbl 0747.92016) Full Text: DOI
Eda, Katsuya The first integral singular homology groups of one point unions. (English) Zbl 0754.55004 Q. J. Math., Oxf. II. Ser. 42, No. 168, 443-456 (1991). Reviewer: I.D.Albu (Timişoara) MSC: 55N10 55Q20 PDFBibTeX XMLCite \textit{K. Eda}, Q. J. Math., Oxf. II. Ser. 42, No. 168, 443--456 (1991; Zbl 0754.55004) Full Text: DOI
Shimakawa, Kazuhisa A note on \(\Gamma_G\)-spaces. (English) Zbl 0759.55009 Osaka J. Math. 28, No. 2, 223-228 (1991). Reviewer: Hsu Tung Ku (Amherst) MSC: 55P42 55P91 PDFBibTeX XMLCite \textit{K. Shimakawa}, Osaka J. Math. 28, No. 2, 223--228 (1991; Zbl 0759.55009)
Ōshima, Hideaki; Takahara, Kōji Cohomotopy of Lie groups. (English) Zbl 0752.57021 Osaka J. Math. 28, No. 2, 213-221 (1991). Reviewer: I.Pop (Iaşi) MSC: 57T20 55Q55 PDFBibTeX XMLCite \textit{H. Ōshima} and \textit{K. Takahara}, Osaka J. Math. 28, No. 2, 213--221 (1991; Zbl 0752.57021)
Endres, Norbert Group related symmetric groupoids. (English) Zbl 0810.20054 Demonstr. Math. 24, No. 1-2, 63-74 (1991). Reviewer: W.A.Dudek (Wrocław) MSC: 20N02 55Q40 PDFBibTeX XMLCite \textit{N. Endres}, Demonstr. Math. 24, No. 1--2, 63--74 (1991; Zbl 0810.20054) Full Text: DOI
Nezhinskij, V. M. Homotopy theory for the classification of singular links. (Russian. English summary) Zbl 0752.57012 Zap. Nauchn. Semin. Leningr. Otd. Mat. Inst. Steklova 193, 101-118 (1991). Reviewer: U.Koschorke (Siegen) MSC: 57Q45 55Q70 PDFBibTeX XMLCite \textit{V. M. Nezhinskij}, Zap. Nauchn. Semin. Leningr. Otd. Mat. Inst. Steklova 193, 101--118 (1991; Zbl 0752.57012) Full Text: EuDML
Itenberg, I. V. Rigid isotopic classification of curves of degree 6 with a nondegenerate double point. (Russian. English summary) Zbl 0762.14031 Zap. Nauchn. Semin. Leningr. Otd. Mat. Inst. Steklova 193, 72-89 (1991). Reviewer: E.I.Shustin (Kujbyshev) MSC: 14P25 14J28 14H45 14F35 PDFBibTeX XMLCite \textit{I. V. Itenberg}, Zap. Nauchn. Semin. Leningr. Otd. Mat. Inst. Steklova 193, 72--89 (1991; Zbl 0762.14031) Full Text: EuDML
Reineck, James F. Continuation to gradient flows. (English) Zbl 0753.58016 Duke Math. J. 64, No. 2, 261-269 (1991). Reviewer: A.Klíč (Praha) MSC: 37D15 37C70 55P15 55P99 PDFBibTeX XMLCite \textit{J. F. Reineck}, Duke Math. J. 64, No. 2, 261--269 (1991; Zbl 0753.58016) Full Text: DOI
Kronheimer, P. B. Instanton invariants and flat connections on the Kummer surface. (English) Zbl 0754.57015 Duke Math. J. 64, No. 2, 229-241 (1991). Reviewer: P.Teichner (Mainz) MSC: 57N13 58J10 57R55 58E15 32J15 PDFBibTeX XMLCite \textit{P. B. Kronheimer}, Duke Math. J. 64, No. 2, 229--241 (1991; Zbl 0754.57015) Full Text: DOI
Xiao, Gang \({\pi{}}_ 1\) of elliptic and hyperelliptic surfaces. (English) Zbl 0762.14013 Int. J. Math. 2, No. 5, 599-615 (1991). Reviewer: Vo Van Tan (Boston) MSC: 14F35 14J27 14F45 14H10 PDFBibTeX XMLCite \textit{G. Xiao}, Int. J. Math. 2, No. 5, 599--615 (1991; Zbl 0762.14013) Full Text: DOI
Sikorav, J.-C. Some properties of Lagrangian embeddings. (Quelques propriétés des plongements Lagrangiens.) (French) Zbl 0751.58010 Mém. Soc. Math. Fr., Nouv. Sér. 46, 151-167 (1991). Reviewer: M.Puta (Timişoara) MSC: 53D12 57R40 57R52 PDFBibTeX XMLCite \textit{J. C. Sikorav}, Mém. Soc. Math. Fr., Nouv. Sér. 46, 151--167 (1991; Zbl 0751.58010) Full Text: DOI Numdam EuDML
Gromov, M.; Shubin, M. A. Von Neumann spectra near zero. (English) Zbl 0751.58039 Geom. Funct. Anal. 1, No. 4, 375-404 (1991). Reviewer: M.Puta (Timişoara) MSC: 58J50 58J20 PDFBibTeX XMLCite \textit{M. Gromov} and \textit{M. A. Shubin}, Geom. Funct. Anal. 1, No. 4, 375--404 (1991; Zbl 0751.58039) Full Text: DOI EuDML
Fel’shtyn, A. L. Rokhlin invariant, \(\eta{}\)-invariant, and the Reidemeister torsion. (English. Russian original) Zbl 0791.58087 St. Petersbg. Math. J. 3, No. 4, 893-902 (1992); translation from Algebra Anal. 3, No. 4, 198-207 (1991). MSC: 58J20 57Q10 PDFBibTeX XMLCite \textit{A. L. Fel'shtyn}, St. Petersbg. Math. J. 3, No. 4, 893--902 (1991; Zbl 0791.58087); translation from Algebra Anal. 3, No. 4, 198--207 (1991)
Buyalo, S. V. Homotopy invariance of some geometric properties of three-dimensional manifolds of nonpositive curvature. (English. Russian original) Zbl 0791.53042 St. Petersbg. Math. J. 3, No. 4, 791-808 (1992); translation from Algebra Anal. 3, No. 4, 93-112 (1991). MSC: 53C20 PDFBibTeX XMLCite \textit{S. V. Buyalo}, St. Petersbg. Math. J. 3, No. 4, 791--808 (1991; Zbl 0791.53042); translation from Algebra Anal. 3, No. 4, 93--112 (1991)
Chéniot, Denis Topology of the complement of a projective algebraic set. (Topologie du complémentaire d’un ensemble algébrique projectif.) (French) Zbl 0762.55003 Enseign. Math., II. Sér. 37, No. 3-4, 293-402 (1991). Reviewer: K.Drechsler (Halle-Neustadt) MSC: 55N10 14D05 PDFBibTeX XMLCite \textit{D. Chéniot}, Enseign. Math. (2) 37, No. 3--4, 293--402 (1991; Zbl 0762.55003)
Mahowald, Mark; Richter, William \(\Omega\)SU(3) splits after four suspensions, but not two. (English) Zbl 0754.55005 Math. Z. 208, No. 4, 597-615 (1991). Reviewer: E.Ossa (Wuppertal) MSC: 55P40 55P42 55P35 PDFBibTeX XMLCite \textit{M. Mahowald} and \textit{W. Richter}, Math. Z. 208, No. 4, 597--615 (1991; Zbl 0754.55005) Full Text: DOI EuDML
Lück, Wolfgang; Rothenberg, Mel Reidemeister torsion and the \(K\)-theory of von Neumann algebras. (English) Zbl 0748.57007 \(K\)-Theory 5, No. 3, 213-264 (1991). Reviewer: Gh.Pitiş (Braşov) MSC: 57Q10 55N35 58J10 55S25 19D10 PDFBibTeX XMLCite \textit{W. Lück} and \textit{M. Rothenberg}, \(K\)-Theory 5, No. 3, 213--264 (1991; Zbl 0748.57007) Full Text: DOI
Nistor, Victor A bivariant Chern character for \(p\)-summable quasihomomorphisms. (English) Zbl 0784.19001 \(K\)-Theory 5, No. 3, 193-211 (1991). Reviewer: M.Puschnigg (Heidelberg) MSC: 19K56 19D55 18G60 55N15 PDFBibTeX XMLCite \textit{V. Nistor}, \(K\)-Theory 5, No. 3, 193--211 (1991; Zbl 0784.19001) Full Text: DOI
Cauty, Robert Caractérisation topologique de l’espace des fonctions dérivables. (Topological characterization of the space of differentiable functions). (French) Zbl 0770.54015 Fundam. Math. 138, No. 1, 35-58 (1991). Reviewer: V.L.Hansen (Lyngby) MSC: 54C35 54F65 58B05 54C30 54C55 PDFBibTeX XMLCite \textit{R. Cauty}, Fundam. Math. 138, No. 1, 35--58 (1991; Zbl 0770.54015) Full Text: DOI EuDML
Hennes, Matthias On homotopy types of four-dimensional polyhedra. (Über Homotopietypen von vierdimensionalen Polyedern.) (German) Zbl 0796.55004 Bonner Mathematische Schriften. 226. Bonn: Univ. Bonn, Math.-Naturw. Fakultät, xiii, 98 p. (1991). MSC: 55P15 PDFBibTeX XMLCite \textit{M. Hennes}, Über Homotopietypen von vierdimensionalen Polyedern. Bonn: Univ. Bonn, Math.-Naturwissenschaftliche Fakultät (1991; Zbl 0796.55004)
Ivanšić, I.; Uglešić, N. Localization of compacta at SSDR maps is not a homotopy category. (English) Zbl 0798.55008 Glas. Mat., III. Ser. 26, No. 1-2, 209-218 (1991). Reviewer: C.Mohorianu (Iaşi) MSC: 55P55 PDFBibTeX XMLCite \textit{I. Ivanšić} and \textit{N. Uglešić}, Glas. Mat., III. Ser. 26, No. 1--2, 209--218 (1991; Zbl 0798.55008)
Günther, Bernd Comparison of the coherent pro-homotopy theories of Edwards-Hastings, Lisica-Mardešić and Günther. (English) Zbl 0795.55010 Glas. Mat., III. Ser. 26, No. 1-2, 141-176 (1991). Reviewer: T.Porter (Bangor) MSC: 55P55 PDFBibTeX XMLCite \textit{B. Günther}, Glas. Mat., III. Ser. 26, No. 1--2, 141--176 (1991; Zbl 0795.55010)
Mimura, Mamoru; Toda, Hirosi Topology of Lie groups, I and II. Transl. from the Jap. by Mamoru Mimura and Hirosi Toda. (English) Zbl 0757.57001 Translations of Mathematical Monographs. 91. Providence, RI: American Mathematical Society (AMS). iv, 451 p. (1991). Reviewer: S.Y.Husseini (Madison) MSC: 57-02 57Txx PDFBibTeX XMLCite \textit{M. Mimura} and \textit{H. Toda}, Topology of Lie groups, I and II. Transl. from the Jap. by Mamoru Mimura and Hirosi Toda. Providence, RI: American Mathematical Society (1991; Zbl 0757.57001) Backlinks: MO
Mardešić, Sibe Strong expansions and strong shape for pairs of spaces. (English) Zbl 0790.54019 Rad Hrvat. Akad. Znan. Umjet. 456, Mat. Znan. 10, 159-172 (1991). Reviewer: S. Singh (San Marcos) MSC: 54C56 55P55 PDFBibTeX XMLCite \textit{S. Mardešić}, Rad Hrvat. Akad. Znan. Umjet., Mat. Znan. 456(10), 159--172 (1991; Zbl 0790.54019)
Tran Van Thuong Homotopy extension theorem for a fiber-preserving piecewise linear \(\mu\)-homotopy. (English) Zbl 1097.55501 Missouri J. Math. Sci. 3, No. 1, 10 p. (1991). MSC: 55P05 54D20 54C55 PDFBibTeX XMLCite \textit{Tran Van Thuong}, Missouri J. Math. Sci. 3, No. 1, 10 p. (1991; Zbl 1097.55501)
Srinivas, V. Algebraic \(K\)-theory. (English) Zbl 0722.19001 Progress in Mathematics, 90. Boston, MA etc.: Birkhäuser. xv, 314 p. sFr. 88.00; DM 106.00 (1991). Reviewer: W.W.J.Hulsbergen (Breda) MSC: 19-01 19-02 18F25 19Dxx 19Axx 19Bxx 19Cxx 19D06 19E08 14C35 PDFBibTeX XMLCite \textit{V. Srinivas}, Algebraic \(K\)-theory. Boston, MA etc.: Birkhäuser (1991; Zbl 0722.19001)
Jeremías López, Ana The relative fundamental group. Galois theory and localization. (El grupo fundamental relativo. Teoría de Galois y localización.) (Spanish) Zbl 0726.13007 Álxebra 56. Santiago de Compostela: Universidad de Santiago de Compostela, Departamento de Álgebra. xvii, 151 p. (1991). Reviewer: Marek Golasiński (Toruń) MSC: 13D03 18E35 16D90 13B05 55Q99 PDFBibTeX XMLCite \textit{A. Jeremías López}, El grupo fundamental relativo. Teoría de Galois y localización (Spanish). Santiago de Compostela: Univ. de Santiago de Compostela, Dep. de Algebra (1991; Zbl 0726.13007)
Benson, D. J. Representations and cohomology. II: Cohomology of groups and modules. (English) Zbl 0731.20001 Cambridge Studies in Advanced Mathematics, 31. New York etc.: Cambridge University Press. x, 278 p. £35.00; $ 59.95 (1991). Reviewer: B.Külshammer (Augsburg) MSC: 20-01 20C15 20J06 19D55 18G10 18G15 18G30 55Q05 18G40 55U15 55U25 55U20 19A22 20-02 PDFBibTeX XMLCite \textit{D. J. Benson}, Representations and cohomology. II: Cohomology of groups and modules. New York etc.: Cambridge University Press (1991; Zbl 0731.20001)
Hagopian, Charles L. A fixed-point theorem for tree-like continua. (English) Zbl 0786.54043 Topol. Proc. 16, 57-62 (1991). Reviewer: J.J.Charatonik (Wrocław) MSC: 54H25 54F15 54F50 PDFBibTeX XMLCite \textit{C. L. Hagopian}, Topol. Proc. 16, 57--62 (1991; Zbl 0786.54043)
tom Dieck, Tammo Topologie. (Topology). (German) Zbl 0731.55001 De Gruyter Lehrbuch. Berlin etc.: Walter de Gruyter. ix, 401 S. DM 98.00/hbk; DM 58.00/pbk (1991). Reviewer: J.Appell (Würzburg) MSC: 55-01 57-01 55N22 PDFBibTeX XMLCite \textit{T. tom Dieck}, Topologie. (Topology). Berlin etc.: Walter de Gruyter (1991; Zbl 0731.55001)
Baues, Hans Joachim Combinatorial homotopy and 4-dimensional complexes. (English) Zbl 0716.55001 De Gruyter Expositions in Mathematics, 2. Berlin etc.: Walter de Gruyter. xxvii, 380 p. DM 158.00/hbk (1991). Reviewer: H.M.Unsöld MSC: 55-02 55P15 55S05 18G35 18G55 55Q20 55U35 PDFBibTeX XMLCite \textit{H. J. Baues}, Combinatorial homotopy and 4-dimensional complexes. Berlin etc.: Walter de Gruyter (1991; Zbl 0716.55001)
Šekutkovski, Nikita Coherent category COH. (English) Zbl 0814.55004 Mat. Bilt. 15, 23-31 (1991). Reviewer: Klaus Heiner Kamps (Hagen) MSC: 55P55 55P99 55N99 PDFBibTeX XMLCite \textit{N. Šekutkovski}, Mat. Bilt. 15, 23--31 (1991; Zbl 0814.55004)
Tralle, A. E. Cyclic homology of certain topological spaces formal in the sense of Sullivan. (English. Russian original) Zbl 0779.55009 Math. Notes 50, No. 6, 1305-1312 (1991); translation from Mat. Zametki 50, No. 6, 131-141 (1991). MSC: 55P62 18G60 PDFBibTeX XMLCite \textit{A. E. Tralle}, Math. Notes 50, No. 6, 1305--1312 (1991; Zbl 0779.55009); translation from Mat. Zametki 50, No. 6, 131--141 (1991) Full Text: DOI
Nunes, Marc Cohomological results in monoid and category theory via classifying spaces. (English) Zbl 0787.18010 Rhodes, John (ed.), Monoids and semigroups with applications. Proceedings of the Berkeley workshop in monoids, Berkeley, CA, USA, 31 July - 5 August 1989. Singapore etc.: World Scientific Publishing. 55-82 (1991). MSC: 18G99 20M50 55U99 PDFBibTeX XMLCite \textit{M. Nunes}, in: Monoids and semigroups with applications. Proceedings of the Berkeley workshop in monoids, Berkeley, CA, USA, 31 July - 5 August 1989. Singapore etc.: World Scientific Publishing. 55--82 (1991; Zbl 0787.18010)