Chen, Linxiao; Curien, Nicolas; Maillard, Pascal The perimeter cascade in critical Boltzmann quadrangulations decorated by an \(O(n)\) loop model. (English) Zbl 07290131 Ann. Inst. Henri Poincaré D, Comb. Phys. Interact. (AIHPD) 7, No. 4, 535-584 (2020). MSC: 05C80 05C81 60K35 60J80 PDF BibTeX XML Cite \textit{L. Chen} et al., Ann. Inst. Henri Poincaré D, Comb. Phys. Interact. (AIHPD) 7, No. 4, 535--584 (2020; Zbl 07290131) Full Text: DOI
Liu, Jinliang; Wang, Yuda; Zha, Lijuan; Yan, Huaicheng Event-based control for networked T-S fuzzy cascade control systems with quantization and cyber attacks. (English) Zbl 1423.93200 J. Franklin Inst. 356, No. 16, 9451-9473 (2019). MSC: 93C42 93C65 93C83 PDF BibTeX XML Cite \textit{J. Liu} et al., J. Franklin Inst. 356, No. 16, 9451--9473 (2019; Zbl 1423.93200) Full Text: DOI
Zárate-Navarro, Marco A.; García-Sandoval, J. Paulo; Hudon, Nicolas A saturated feedforward/cascade controller for passive continuous reacting systems using entropy production shaping. (English) Zbl 1418.93165 Eur. J. Control 49, 53-61 (2019). MSC: 93C83 93D05 PDF BibTeX XML Cite \textit{M. A. Zárate-Navarro} et al., Eur. J. Control 49, 53--61 (2019; Zbl 1418.93165) Full Text: DOI
Nikzad, Erfaneh; Amiri, Amirhossein; Amirkhani, Farzad Estimating total and specific process capability indices in three-stage processes with measurement errors. (English) Zbl 07192702 J. Stat. Comput. Simulation 88, No. 15, 3033-3064 (2018). MSC: 62 PDF BibTeX XML Cite \textit{E. Nikzad} et al., J. Stat. Comput. Simulation 88, No. 15, 3033--3064 (2018; Zbl 07192702) Full Text: DOI
Bilushchak, Y. I.; Chernukha, O. Y. Modelling of two-way heterodiffusion processes at cascade decay of admixture particles. I: Cascade-type boundary value problems. (Ukrainian, English) Zbl 1438.76038 Mat. Metody Fiz.-Mekh. Polya 61, No. 3, 122-131 (2018). Reviewer: V. A. Martynyuk (Kyïv) MSC: 76R50 60J60 74M25 PDF BibTeX XML Cite \textit{Y. I. Bilushchak} and \textit{O. Y. Chernukha}, Mat. Metody Fiz.-Mekh. Polya 61, No. 3, 122--131 (2018; Zbl 1438.76038)
Kucyi, N. N.; Lukyanov, A. V.; Kargapol’cev, S. K.; Tikhii Training of neural network based PWM controllers. (English) Zbl 1427.93156 Adv. Appl. Discrete Math. 19, No. 4, 359-371 (2018). MSC: 93C83 93B70 93B50 PDF BibTeX XML Cite \textit{N. N. Kucyi} et al., Adv. Appl. Discrete Math. 19, No. 4, 359--371 (2018; Zbl 1427.93156) Full Text: DOI
Farza, Mondher; Hernández-González, Omar; Ménard, Tomas; Targui, Boubekeur; M’Saad, Mohammed; Astorga-Zaragoza, Carlos-Manuel Cascade observer design for a class of uncertain nonlinear systems with delayed outputs. (English) Zbl 1387.93049 Automatica 89, 125-134 (2018). MSC: 93B07 93C10 93C41 93C15 93C57 PDF BibTeX XML Cite \textit{M. Farza} et al., Automatica 89, 125--134 (2018; Zbl 1387.93049) Full Text: DOI
Zhang, Jinggang; Qin, Nana Design method of IMC controllers for unstable cascade processes with time delay. (Chinese. English summary) Zbl 1389.93095 J. Univ. Electron. Sci. Technol. China 46, No. 1, 38-45 (2017). MSC: 93B35 93D99 93B51 PDF BibTeX XML Cite \textit{J. Zhang} and \textit{N. Qin}, J. Univ. Electron. Sci. Technol. China 46, No. 1, 38--45 (2017; Zbl 1389.93095) Full Text: DOI
Gohm, Rolf Weak Markov processes as linear systems. (English) Zbl 1339.46062 Math. Control Signals Syst. 27, No. 3, 375-413 (2015). MSC: 46L53 47A20 93B07 PDF BibTeX XML Cite \textit{R. Gohm}, Math. Control Signals Syst. 27, No. 3, 375--413 (2015; Zbl 1339.46062) Full Text: DOI arXiv
Jia, Li; Li, Xunlong Identification of Hammerstein model: review and prospect. (Chinese. English summary) Zbl 1313.93041 Control Theory Appl. 31, No. 1, 1-10 (2014). MSC: 93B30 93A30 PDF BibTeX XML Cite \textit{L. Jia} and \textit{X. Li}, Control Theory Appl. 31, No. 1, 1--10 (2014; Zbl 1313.93041) Full Text: DOI
Ninagawa, Shigeru Solving the parity problem with rule 60 in array size of the power of two. (English) Zbl 1280.68135 J. Cell. Autom. 8, No. 3-4, 189-203 (2013). MSC: 68Q80 PDF BibTeX XML Cite \textit{S. Ninagawa}, J. Cell. Autom. 8, No. 3--4, 189--203 (2013; Zbl 1280.68135)
Birnir, Björn The Kolmogorov-Obukhov statistical theory of turbulence. (English) Zbl 1282.76112 J. Nonlinear Sci. 23, No. 4, 657-688 (2013). MSC: 76F55 76M35 60H15 35Q30 76D05 PDF BibTeX XML Cite \textit{B. Birnir}, J. Nonlinear Sci. 23, No. 4, 657--688 (2013; Zbl 1282.76112) Full Text: DOI
Yang, Hongxia; Wang, Jun; Mojslovic, Alexsandra Cascade model with Dirichlet process for analyzing multiple dyadic matrices. (English) Zbl 07263561 J. Appl. Stat. 39, No. 9, 1991-2003 (2012). MSC: 62 PDF BibTeX XML Cite \textit{H. Yang} et al., J. Appl. Stat. 39, No. 9, 1991--2003 (2012; Zbl 07263561) Full Text: DOI
Jelenković, Predrag R.; Olvera-Cravioto, Mariana Implicit renewal theory and power tails on trees. (English) Zbl 1253.60076 Adv. Appl. Probab. 44, No. 2, 528-561 (2012). Reviewer: Valentin Topchii (Omsk) MSC: 60H25 60K05 60J80 60F10 PDF BibTeX XML Cite \textit{P. R. Jelenković} and \textit{M. Olvera-Cravioto}, Adv. Appl. Probab. 44, No. 2, 528--561 (2012; Zbl 1253.60076) Full Text: DOI Euclid arXiv
Jin, Xiong Dimension result and KPZ formula for two-dimensional multiplicative cascade processes. (English) Zbl 1298.60046 Ann. Probab. 40, No. 1, 1-18 (2012). Reviewer: Kun Soo Chang (Seoul) MSC: 60G18 60G57 28A78 28A80 60K40 81T40 PDF BibTeX XML Cite \textit{X. Jin}, Ann. Probab. 40, No. 1, 1--18 (2012; Zbl 1298.60046) Full Text: DOI arXiv
Asadzadeh, Shervin; Zerehsaz, Yaser; Saghaei, Abbas; Aghaie, Abdollah Compound-estimator based cause-selecting control chart for monitoring multistage processes. (English) Zbl 1217.62211 Commun. Stat., Simulation Comput. 40, No. 3, 322-344 (2011). MSC: 62P30 62F35 65C60 93C83 PDF BibTeX XML Cite \textit{S. Asadzadeh} et al., Commun. Stat., Simulation Comput. 40, No. 3, 322--344 (2011; Zbl 1217.62211) Full Text: DOI
Costanzo, G. Damiana; De Bartolo, Samuele; Dell’Accio, F.; Trombetta, G. Using observed functional data to simulate a stochastic process via a random multiplicative cascade model. (English) Zbl 1436.60002 Lechevallier, Yves (ed.) et al., Proceedings of COMPSTAT’2010. 19th international conference on computational statistics, Paris, France, August 22–27, 2010. Keynote, invited and contributed papers. Heidelberg: Physica Verlag. 453-460 (2010). MSC: 60-08 62R10 62-08 PDF BibTeX XML Cite \textit{G. D. Costanzo} et al., in: Proceedings of COMPSTAT'2010. 19th international conference on computational statistics, Paris, France, August 22--27, 2010. Keynote, invited and contributed papers. Heidelberg: Physica Verlag. 453--460 (2010; Zbl 1436.60002) Full Text: DOI
Barral, Julien; Berestycki, Julien; Bertoin, Jean; Fan, Aihua; Haas, Bénédicte; Jaffard, Stéphane; Miermont, Grégory; Peyrière, Jacques Some interactions between analysis, probability theory and fractals. To Benoît Mandelbrot, in memoriam. (Quelques interactions entre analyse, probabilités et fractals. A Benoît Mandelbrot, in memoriam.) (French) Zbl 1308.28002 Panoramas et Synthèses 32. Paris: Société Mathématique de France (SMF) (ISBN 978-2-85629-313-3/pbk). x, 243 p. (2010). MSC: 28-06 60-06 00B30 28A80 28A78 37B40 43A25 60G18 60J80 11J83 11K06 PDF BibTeX XML Cite \textit{J. Barral} et al., Quelques interactions entre analyse, probabilités et fractals. A Benoît Mandelbrot, in memoriam. Paris: Société Mathématique de France (SMF) (2010; Zbl 1308.28002) Full Text: Link
Mannersalo, Petteri; Norros, Ilkka; Riedi, Rudolf H. Multifractal analysis of infinite products of stationary jump processes. (English) Zbl 1213.60073 J. Probab. Stat. 2010, Article ID 807491, 26 p. (2010). Reviewer: Ilya S. Molchanov (Bern) MSC: 60G17 28A80 60G55 60G44 60J75 60K99 PDF BibTeX XML Cite \textit{P. Mannersalo} et al., J. Probab. Stat. 2010, Article ID 807491, 26 p. (2010; Zbl 1213.60073) Full Text: DOI EuDML
Golovnya, B. P. Modeling of the fluctuating component in the form of the sum of an infinite number of random quantities. I: \(k-\varepsilon \) modeling. (English) Zbl 1422.76097 Int. J. Heat Mass Transfer 52, No. 21-22, 5218-5228 (2009). MSC: 76F60 35Q30 PDF BibTeX XML Cite \textit{B. P. Golovnya}, Int. J. Heat Mass Transfer 52, No. 21--22, 5218--5228 (2009; Zbl 1422.76097) Full Text: DOI
Magdziarz, Marcin Correlation cascades, ergodic properties and long memory of infinitely divisible processes. (English) Zbl 1175.60047 Stochastic Processes Appl. 119, No. 10, 3416-3434 (2009). MSC: 60G52 60G10 PDF BibTeX XML Cite \textit{M. Magdziarz}, Stochastic Processes Appl. 119, No. 10, 3416--3434 (2009; Zbl 1175.60047) Full Text: DOI
Jearkpaporn, D.; Borror, C. M.; Runger, G. C.; Montgomery, D. C. Process monitoring for mean shifts for multiple stage processes. (English) Zbl 1128.90386 Int. J. Prod. Res. 45, No. 23, 5547-5570 (2007). MSC: 90B30 PDF BibTeX XML Cite \textit{D. Jearkpaporn} et al., Int. J. Prod. Res. 45, No. 23, 5547--5570 (2007; Zbl 1128.90386) Full Text: DOI
Bertoin, J. Different aspects of a model for random fragmentation processes. (English) Zbl 1137.60045 Markov Process. Relat. Fields 12, No. 2, 335-339 (2006). Reviewer: Aleksander Iksanov (Kiev) MSC: 60J80 60G18 PDF BibTeX XML Cite \textit{J. Bertoin}, Markov Process. Relat. Fields 12, No. 2, 335--339 (2006; Zbl 1137.60045)
Waymire, Edward C. Probability & incompressible Navier-Stokes equations: an overview of some recent developments. (English) Zbl 1189.76424 Probab. Surv. 2, 1-32 (2005). MSC: 76M35 60H30 35Q30 60J80 76D05 76-02 PDF BibTeX XML Cite \textit{E. C. Waymire}, Probab. Surv. 2, 1--32 (2005; Zbl 1189.76424) Full Text: DOI EuDML arXiv
Cheng, Qiuming Multifractal distribution of eigenvalues and eigenvectors from 2D multiplicative cascade multifractal fields. (English) Zbl 1170.86302 Math. Geol. 37, No. 8, 915-927 (2005). MSC: 86A60 PDF BibTeX XML Cite \textit{Q. Cheng}, Math. Geol. 37, No. 8, 915--927 (2005; Zbl 1170.86302) Full Text: DOI
Huillet, Thierry Energy cascades as branching processes with emphasis on Neveu’s approach to Derrida’s random energy model. (English) Zbl 1034.60079 Adv. Appl. Probab. 35, No. 2, 477-503 (2003). MSC: 60J85 60J25 60J75 PDF BibTeX XML Cite \textit{T. Huillet}, Adv. Appl. Probab. 35, No. 2, 477--503 (2003; Zbl 1034.60079) Full Text: DOI
Alvarez-Ramirez, Jose; Alvarez, Jesus; Morales, America An adaptive cascade control for a class of chemical reactors. (English) Zbl 1021.93029 Int. J. Adapt. Control Signal Process. 16, No. 10, 681-701 (2002). Reviewer: Ingmar Randvee (Tallinn) MSC: 93C95 93B51 93D15 93A13 PDF BibTeX XML Cite \textit{J. Alvarez-Ramirez} et al., Int. J. Adapt. Control Signal Process. 16, No. 10, 681--701 (2002; Zbl 1021.93029) Full Text: DOI
Han, Liangxiu; Cen, Zhiwei; Chu, Chunbo; Gao, Chuanshan A new multifractal network traffic model. (English) Zbl 0994.90038 Chaos Solitons Fractals 13, No. 7, 1507-1513 (2002). MSC: 90B20 28A80 PDF BibTeX XML Cite \textit{L. Han} et al., Chaos Solitons Fractals 13, No. 7, 1507--1513 (2002; Zbl 0994.90038) Full Text: DOI
Kashlev, Yu. A. Nonequilibrium statistical thermodynamics of cascade processes in solids: the quasi temperature of cascade particles. (English. Russian original) Zbl 1099.82014 Theor. Math. Phys. 126, No. 2, 258-269 (2001); translation from Teor. Mat. Fiz. 126, No. 2, 311-324 (2001). Reviewer: Bassano Vacchini (Milano) MSC: 82C35 82D20 PDF BibTeX XML Cite \textit{Yu. A. Kashlev}, Theor. Math. Phys. 126, No. 2, 258--269 (2001; Zbl 1099.82014); translation from Teor. Mat. Fiz. 126, No. 2, 311--324 (2001) Full Text: DOI
Protasov, Vladimir The stability of subdivision operator at its fixed point. (English) Zbl 0994.42021 SIAM J. Math. Anal. 33, No. 2, 448-460 (2001). Reviewer: Richard A.Zalik (Auburn University) MSC: 42C40 PDF BibTeX XML Cite \textit{V. Protasov}, SIAM J. Math. Anal. 33, No. 2, 448--460 (2001; Zbl 0994.42021) Full Text: DOI
Wang, Qing-Guo; Zhang, Yong Frequency response identification with cascade relay feedback. (English) Zbl 0992.93055 Int. J. Control 73, No. 18, 1647-1656 (2000). MSC: 93C80 93B52 PDF BibTeX XML Cite \textit{Q.-G. Wang} and \textit{Y. Zhang}, Int. J. Control 73, No. 18, 1647--1656 (2000; Zbl 0992.93055) Full Text: DOI
Yadzhak, M. On numerical realization of cascade digital filtering. (Ukrainian. English summary) Zbl 0985.93035 Visn. L’viv. Univ., Ser. Prykl. Mat. Inform. 2000, No. 3, 75-79 (2000). MSC: 93C62 93E11 93C35 93C83 PDF BibTeX XML Cite \textit{M. Yadzhak}, Visn. L'viv. Univ., Ser. Prykl. Mat. Inform. 2000, No. 3, 75--79 (2000; Zbl 0985.93035)
Honoré, Cyrille; Grésillon, Dominique Turbulence cascade and dynamical exchange between spatial scales. (English) Zbl 0969.76502 J. Fluid Mech. 411, 187-211 (2000). MSC: 76-05 76F55 PDF BibTeX XML Cite \textit{C. Honoré} and \textit{D. Grésillon}, J. Fluid Mech. 411, 187--211 (2000; Zbl 0969.76502) Full Text: DOI
Marcq, Philippe; Naert, Antoine A Langevin equation for the energy cascade in fully developed turbulence. (English) Zbl 0951.76033 Physica D 124, No. 4, 368-381 (1998). MSC: 76F55 PDF BibTeX XML Cite \textit{P. Marcq} and \textit{A. Naert}, Physica D 124, No. 4, 368--381 (1998; Zbl 0951.76033) Full Text: DOI
Jensen, Kurt Coloured Petri nets. Basic concepts, analysis methods and practical use. Vol. 3. (English) Zbl 0883.68098 EATCS Monographs on Theoretical Computer Science. Berlin: Springer. ix, 265 p. (1997). Reviewer: R.Janicki (Hamilton/Ontario) MSC: 68Q85 68-02 PDF BibTeX XML Cite \textit{K. Jensen}, Coloured Petri nets. Basic concepts, analysis methods and practical use. Vol. 3. Berlin: Springer (1997; Zbl 0883.68098)
Romanenko, E. Yu.; Sharkovsky, A. N. From one-dimensional to infinite-dimensional dynamical systems: Ideal turbulence. (English. Ukrainian original) Zbl 0936.37021 Ukr. Math. J. 48, No. 12, 1817-1842 (1996); translation from Ukr. Mat. Zh. 48, No. 12, 1604-1627 (1996). MSC: 37H10 37D45 35R15 39A10 PDF BibTeX XML Cite \textit{E. Yu. Romanenko} and \textit{A. N. Sharkovsky}, Ukr. Math. J. 48, No. 12, 1817--1842 (1996; Zbl 0936.37021); translation from Ukr. Mat. Zh. 48, No. 12, 1604--1627 (1996) Full Text: DOI
Esipov, Sergej E.; Gor’kov, L. P.; Newman, T. J. Fluctuations in fragmentation processes. (English) Zbl 0772.60097 J. Phys. A, Math. Gen. 26, No. 4, 787-806 (1993). MSC: 60K40 82B21 PDF BibTeX XML Cite \textit{S. E. Esipov} et al., J. Phys. A, Math. Gen. 26, No. 4, 787--806 (1993; Zbl 0772.60097) Full Text: DOI
Ney, Peter Branching random walk. (English) Zbl 0738.60086 Spatial stochastic processes, Festschr. in Honor of Ted Harris 70th Birthday, Prog. Probab. 19, 3-22 (1991). Reviewer: H.J.Weiner (Davis) MSC: 60J80 60G50 60J85 PDF BibTeX XML
Kahane, Jean-Pierre Products of independent random weights and applications. (Produits de poids aléatoires indépendants et applications.) (French) Zbl 0737.60016 Fractal geometry and analysis, Proc. NATO ASI Sémin. Math. Supér., Montréal/ Can. 1989, NATO ASI Ser., Ser. C 346, 277-324 (1991). Reviewer: H.Haase (Greifswald) MSC: 60D05 60B15 60G57 PDF BibTeX XML
Szöllösi-Nagy, A.; Mekis, E. Comparative analysis of three recursive real-time river flow forecasting models: Deterministic, stochastic, and coupled deterministic-stochastic. (English) Zbl 0663.62103 Stochastic Hydrology Hydraul. 2, No. 1, 17-33 (1988). Reviewer: J.Anděl MSC: 62M20 86A05 PDF BibTeX XML Cite \textit{A. Szöllösi-Nagy} and \textit{E. Mekis}, Stochastic Hydrology Hydraul. 2, No. 1, 17--33 (1988; Zbl 0663.62103) Full Text: DOI
Flow instability and turbulence. Proceedings of a symposium held at the Research Institute for Mathematical Sciences, Kyoto University, Kyoto (Japan), January 18-20, 1988. (Japanese) Zbl 0717.76014 RIMS Kokyuroku, 661. Kyoto: Kyoto University, Research Institute for Mathematical Sciences. iv, 314 p. (1988). MSC: 76-06 76-02 00B25 76Fxx PDF BibTeX XML Cite Flow instability and turbulence. Proceedings of a symposium held at the Research Institute for Mathematical Sciences, Kyoto University, Kyoto (Japan), January 18-20, 1988 (Japanese). Kyoto: Kyoto University, Research Institute for Mathematical Sciences (1988; Zbl 0717.76014)
Sharkovskij, A. N.; Majstrenko, Yu. L. Difference equations with continuous time as mathematical models of the structure emergences. (English) Zbl 0622.39002 Dynamical systems and environmental models, Proc. Int. Workshop, Eisenach/GDR 1986, 40-49 (1987). MSC: 39A10 37D45 93A10 PDF BibTeX XML
Montgomery, David; Matthaeus, W. H. Comment on ”Self-organization and energy relaxation in a three- dimensional magnetohydrodynamic plasma”. (English) Zbl 0622.76059 Phys. Fluids 29, 3895 (1986). MSC: 76E25 76X05 76W05 76M99 PDF BibTeX XML Cite \textit{D. Montgomery} and \textit{W. H. Matthaeus}, Phys. Fluids 29, 3895 (1986; Zbl 0622.76059) Full Text: DOI
Horiuchi, Ritoku; Sato, Tetsuya Self-organization and energy relaxation in a three-dimensional magnetohydrodynamic plasma. (English) Zbl 0593.76060 Phys. Fluids 29, 1161-1168 (1986). MSC: 76E25 76X05 76W05 76M99 PDF BibTeX XML Cite \textit{R. Horiuchi} and \textit{T. Sato}, Phys. Fluids 29, 1161--1168 (1986; Zbl 0593.76060) Full Text: DOI
Meauzé, Georges On the use of inverse modes of calculation in two-dimensional cascades and ducts. (English) Zbl 0591.76105 Commun. Appl. Numer. Methods 2, 73-81 (1986). MSC: 76H05 76M99 PDF BibTeX XML Cite \textit{G. Meauzé}, Commun. Appl. Numer. Methods 2, 73--81 (1986; Zbl 0591.76105) Full Text: DOI
Sharkovsky, Alexander; Maistrenko, Yury Turbulence and simple hyperbolic systems. (English) Zbl 0621.76062 Mathematical analysis, Collect. works dedic. F. G. Tricomi, Teubner-Texte Math. 79, 220-235 (1985). MSC: 76F99 76M99 35L20 35R50 35L70 PDF BibTeX XML
McDonald, H.; Shamroth, S. J.; Briley, W. R. Transonic flows with viscous effects. (English) Zbl 0515.76062 Transonic, shock, and multidimensional flows: advances in scientific computing, Proc. Symp., Madison/Wis. 1981, 219-240 (1982). MSC: 76H05 35Q30 76M99 76N10 76D10 65N50 PDF BibTeX XML
Vithal, K. L.; Vats, R. P. Generation of atmospheric turbulence by solar radiation. (English) Zbl 0504.76053 Astrophys. Space Sci. 88, 205-217 (1982). MSC: 76E20 76F99 86A99 PDF BibTeX XML Cite \textit{K. L. Vithal} and \textit{R. P. Vats}, Astrophys. Space Sci. 88, 205--217 (1982; Zbl 0504.76053) Full Text: DOI
Weiland, J.; Sanuki, Heiji; Liu, C. S. Convective cell formation and anomalous diffusion due to electromagnetic drift wave turbulence. (English) Zbl 0471.76122 Phys. Fluids 24, 93-101 (1981). MSC: 76X05 76E25 PDF BibTeX XML Cite \textit{J. Weiland} et al., Phys. Fluids 24, 93--101 (1981; Zbl 0471.76122) Full Text: DOI
Kuinski, Jacek Some remarks on an asymptotical behaviour of the mean number of particles for a population with a doubling energy. (English) Zbl 0397.60070 Fasc. Math. 10, 113-120 (1978). MSC: 60J85 60J80 PDF BibTeX XML Cite \textit{J. Kuinski}, Fasc. Math. 10, 113--120 (1978; Zbl 0397.60070)
Kuinski, Jacek Some remarks on a population with a doubling energy. (English) Zbl 0397.60069 Fasc. Math. 10, 105-112 (1978). MSC: 60J85 60J80 PDF BibTeX XML Cite \textit{J. Kuinski}, Fasc. Math. 10, 105--112 (1978; Zbl 0397.60069)