Witczyński, Krzysztof On Pappus’s theorem in the projective space \(P_ n\). (English) Zbl 0752.51004 Demonstr. Math. 23, No. 4, 1099-1103 (1990). Reviewer: J.Bureš (Praha) MSC: 51A45 PDF BibTeX XML Cite \textit{K. Witczyński}, Demonstr. Math. 23, No. 4, 1099--1103 (1990; Zbl 0752.51004)
Dąbrowski, Jacek Estimation of density function for stationary processes with application to Markov processes. (English) Zbl 0752.62061 Demonstr. Math. 23, No. 4, 1085-1098 (1990). MSC: 62M09 62G07 62M05 62G20 PDF BibTeX XML Cite \textit{J. Dąbrowski}, Demonstr. Math. 23, No. 4, 1085--1098 (1990; Zbl 0752.62061)
Majchrowski, Marian; Rogulski, Jan An inverse problem for a parabolic system of partial differential equations. (English) Zbl 0751.35050 Demonstr. Math. 23, No. 4, 1073-1083 (1990). Reviewer: H.Ding (Beijing) MSC: 35R30 80A23 35K05 35B37 PDF BibTeX XML Cite \textit{M. Majchrowski} and \textit{J. Rogulski}, Demonstr. Math. 23, No. 4, 1073--1083 (1990; Zbl 0751.35050)
Grabarski, Adam Prolongation of the solution of a difference scheme for the equation \(- u''+g(x)u=f(x)\). (English) Zbl 0744.65052 Demonstr. Math. 23, No. 4, 1065-1072 (1990). Reviewer: P.Chocholatý (Bratislava) MSC: 65L10 65L12 34B05 PDF BibTeX XML Cite \textit{A. Grabarski}, Demonstr. Math. 23, No. 4, 1065--1072 (1990; Zbl 0744.65052) Full Text: DOI
Kalfat, Abderrahim Remarks on Volterra right inverses for weighted difference operator of high degree. (English) Zbl 0738.47026 Demonstr. Math. 23, No. 4, 1055-1064 (1990). MSC: 47B39 47A05 47L05 39A70 PDF BibTeX XML Cite \textit{A. Kalfat}, Demonstr. Math. 23, No. 4, 1055--1064 (1990; Zbl 0738.47026) Full Text: DOI
Binderman, Zbigniew Complex R-shifts for right invertible operators. (English) Zbl 0754.47002 Demonstr. Math. 23, No. 4, 1043-1053 (1990). Reviewer: D.Przeworska-Rolewicz (Warszawa) MSC: 47A05 PDF BibTeX XML Cite \textit{Z. Binderman}, Demonstr. Math. 23, No. 4, 1043--1053 (1990; Zbl 0754.47002) Full Text: DOI
Grabarska, Halina The approximation of solutions of the Fourier problem of the first kind for systems of parabolic equations. (English) Zbl 0779.35007 Demonstr. Math. 23, No. 4, 1033-1042 (1990). Reviewer: R.D.Grigorieff (Berlin) MSC: 35A35 35K55 PDF BibTeX XML Cite \textit{H. Grabarska}, Demonstr. Math. 23, No. 4, 1033--1042 (1990; Zbl 0779.35007) Full Text: DOI
Dȩbiński, H.; Poreda, T.; Szadkowska, A. On the stability of the generalized linear differential equation of first order in Banach spaces. (English) Zbl 0746.34037 Demonstr. Math. 23, No. 4, 1021-1031 (1990). Reviewer: L.P.Lebedev (Rostov-na-Donu) MSC: 34G20 34D20 PDF BibTeX XML Cite \textit{H. Dȩbiński} et al., Demonstr. Math. 23, No. 4, 1021--1031 (1990; Zbl 0746.34037)
Małecki, Romuald Estimates of the solution of the boundary-value problem with a complex parameter for a certain elliptic system. (English) Zbl 0755.35032 Demonstr. Math. 23, No. 4, 1005-1020 (1990). MSC: 35J40 35B05 PDF BibTeX XML Cite \textit{R. Małecki}, Demonstr. Math. 23, No. 4, 1005--1020 (1990; Zbl 0755.35032)
Kozak, Monika An abstract nonlinear temporally inhomogeneous equation. (English) Zbl 0746.34038 Demonstr. Math. 23, No. 4, 993-1003 (1990). Reviewer: P.Crăciunaş (Iaşi) MSC: 34G20 47D03 PDF BibTeX XML Cite \textit{M. Kozak}, Demonstr. Math. 23, No. 4, 993--1003 (1990; Zbl 0746.34038) Full Text: DOI
Popa, Valeriu Some properties of almost feebly continuous functions. (English) Zbl 0760.54010 Demonstr. Math. 23, No. 4, 985-991 (1990). Reviewer: E.Duda (Coral Gables) MSC: 54C10 PDF BibTeX XML Cite \textit{V. Popa}, Demonstr. Math. 23, No. 4, 985--991 (1990; Zbl 0760.54010) Full Text: DOI
Zurawiecki, Jerzy Locally reducible iterative systems. (English) Zbl 0747.94009 Demonstr. Math. 23, No. 4, 961-983 (1990). MSC: 94A55 PDF BibTeX XML Cite \textit{J. Zurawiecki}, Demonstr. Math. 23, No. 4, 961--983 (1990; Zbl 0747.94009)
Roos, H.-G.; Pfeifer, E. A convergence result for the Tau method. (English) Zbl 0745.65052 Demonstr. Math. 23, No. 4, 951-959 (1990). Reviewer: P.Chocholatý (Bratislava) MSC: 65L10 65L60 34B05 PDF BibTeX XML Cite \textit{H. G. Roos} and \textit{E. Pfeifer}, Demonstr. Math. 23, No. 4, 951--959 (1990; Zbl 0745.65052) Full Text: DOI
Pilecka-Oborska, Barbara A modification of the construction of the output function. (Une modification de la construction de la fonction de sortie.) (French) Zbl 0749.39006 Demonstr. Math. 23, No. 4, 943-949 (1990). Reviewer: H.L.Vasudeva (Chandigarh) MSC: 39B52 PDF BibTeX XML Cite \textit{B. Pilecka-Oborska}, Demonstr. Math. 23, No. 4, 943--949 (1990; Zbl 0749.39006) Full Text: DOI
Yue Chi Ming, Roger Injectivity and annihilators. (English) Zbl 0743.16005 Demonstr. Math. 23, No. 4, 929-942 (1990). Reviewer: F.Théron (Pretoria) MSC: 16D50 16E50 16L60 16P60 PDF BibTeX XML Cite \textit{R. Yue Chi Ming}, Demonstr. Math. 23, No. 4, 929--942 (1990; Zbl 0743.16005)
Dudek, Zbigniew On multiplicative operators in commutative algebras. (English) Zbl 0738.47028 Demonstr. Math. 23, No. 4, 921-928 (1990). MSC: 47C05 PDF BibTeX XML Cite \textit{Z. Dudek}, Demonstr. Math. 23, No. 4, 921--928 (1990; Zbl 0738.47028) Full Text: DOI
Dvurečenskij, Anatolij; Kôpka, František On representation theorems for observables in weakly complemented posets. (English) Zbl 0767.03032 Demonstr. Math. 23, No. 4, 911-920 (1990). Reviewer: M.Navara (Praha) MSC: 03G12 06C15 28A60 81P10 PDF BibTeX XML Cite \textit{A. Dvurečenskij} and \textit{F. Kôpka}, Demonstr. Math. 23, No. 4, 911--920 (1990; Zbl 0767.03032)
Sosulski, Władysław On neutral partial functional-differential inclusions of hyperbolic type. (English) Zbl 0764.35116 Demonstr. Math. 23, No. 4, 893-909 (1990). Reviewer: Cui Baotong (Binzhou) MSC: 35R10 35L70 35B05 PDF BibTeX XML Cite \textit{W. Sosulski}, Demonstr. Math. 23, No. 4, 893--909 (1990; Zbl 0764.35116) Full Text: DOI
Janiec, Eugeniusz Some uniqueness theorems concerning holomorphic mappings. (English) Zbl 0755.32002 Demonstr. Math. 23, No. 4, 879-892 (1990). Reviewer: J.Gopala Krishna (Visakhapatnam) MSC: 32A05 32A10 30B10 32A30 PDF BibTeX XML Cite \textit{E. Janiec}, Demonstr. Math. 23, No. 4, 879--892 (1990; Zbl 0755.32002) Full Text: DOI
Kapoor, G. P.; Juneja, O. P.; Patel, J. Analytic functions with some univalent Gelfond-Leontev derivatives. (English) Zbl 0747.30008 Demonstr. Math. 23, No. 4, 863-877 (1990). Reviewer: K.S.Padmanabhan (Madras) MSC: 30C45 PDF BibTeX XML Cite \textit{G. P. Kapoor} et al., Demonstr. Math. 23, No. 4, 863--877 (1990; Zbl 0747.30008)
Andrew, Paul Quasi-inverse forms and extended operators. (English) Zbl 0743.47001 Demonstr. Math. 23, No. 4, 857-862 (1990). MSC: 47A05 PDF BibTeX XML Cite \textit{P. Andrew}, Demonstr. Math. 23, No. 4, 857--862 (1990; Zbl 0743.47001) Full Text: DOI
Adu, D. I. On a characterization of \(CM\)-homomorphisms. (English) Zbl 0763.20022 Demonstr. Math. 23, No. 4, 847-855 (1990). Reviewer: Kenneth D. Magill, jun. (Buffalo) MSC: 20M15 20M20 PDF BibTeX XML Cite \textit{D. I. Adu}, Demonstr. Math. 23, No. 4, 847--855 (1990; Zbl 0763.20022) Full Text: DOI
Das, P. K. \(H^ \infty\) interpolation into a class of analytic functions. (English) Zbl 0747.30024 Demonstr. Math. 23, No. 4, 841-845 (1990). Reviewer: R.Mortini (Karlsruhe) MSC: 30E05 30H05 46J15 PDF BibTeX XML Cite \textit{P. K. Das}, Demonstr. Math. 23, No. 4, 841--845 (1990; Zbl 0747.30024) Full Text: DOI
Tabash, Khalil I. Automorphisms of \(P_0P\)-lattices with distinguished chain base. (English) Zbl 0742.06009 Demonstr. Math. 23, No. 4, 829-840 (1990). MSC: 06D05 06D25 20B25 PDF BibTeX XML Cite \textit{K. I. Tabash}, Demonstr. Math. 23, No. 4, 829--840 (1990; Zbl 0742.06009) Full Text: DOI
Stachowiak-Gniłka, Danuta Classes and spaces of Ul’yanov type. II: Topological properties of spaces \(\varphi (\ell)\). (English) Zbl 0747.46005 Demonstr. Math. 23, No. 4, 813-827 (1990). Reviewer: G.O.Okikiolu (London) MSC: 46A45 46E30 PDF BibTeX XML Cite \textit{D. Stachowiak-Gniłka}, Demonstr. Math. 23, No. 4, 813--827 (1990; Zbl 0747.46005)