Wysocki, Hubert On a generalization of the Hilbert space. (English) Zbl 0833.46014 Demonstr. Math. 22, No. 1, 1-19 (1989). MSC: 46C50 PDF BibTeX XML Cite \textit{H. Wysocki}, Demonstr. Math. 22, No. 1, 1--19 (1989; Zbl 0833.46014) Full Text: DOI OpenURL
Popenda, Jerzy Remark on a paper of Turinici. (English) Zbl 0718.47030 Demonstr. Math. 22, No. 1, 203-212 (1989). Reviewer: M.Wolff (Tübingen) MSC: 47H07 26D15 47A63 39A70 39A12 PDF BibTeX XML Cite \textit{J. Popenda}, Demonstr. Math. 22, No. 1, 203--212 (1989; Zbl 0718.47030) Full Text: DOI OpenURL
Cristea, Mihai When closed maps are proper or continuous. (English) Zbl 0713.54016 Demonstr. Math. 22, No. 1, 229-233 (1989). Reviewer: J.Jedrzejewski MSC: 54C10 PDF BibTeX XML Cite \textit{M. Cristea}, Demonstr. Math. 22, No. 1, 229--233 (1989; Zbl 0713.54016) Full Text: DOI OpenURL
Jankowski, Tadeusz Convergence of difference methods for boundary value problems of ODE’s with discontinuities. (English) Zbl 0708.65060 Demonstr. Math. 22, No. 1, 51-65 (1989). Reviewer: Helmut Weber (Wiesbaden) MSC: 65J15 65L10 34G20 34B15 PDF BibTeX XML Cite \textit{T. Jankowski}, Demonstr. Math. 22, No. 1, 51--65 (1989; Zbl 0708.65060) Full Text: DOI OpenURL
Stachowiak-Gnilka, Danuta Classes and spaces of Ul’yanov type. I: A class \(\phi\) (\(\ell)\). (English) Zbl 0707.46011 Demonstr. Math. 22, No. 1, 129-137 (1989). Reviewer: G.O.Okikiolu MSC: 46B45 46E30 PDF BibTeX XML Cite \textit{D. Stachowiak-Gnilka}, Demonstr. Math. 22, No. 1, 129--137 (1989; Zbl 0707.46011) Full Text: DOI OpenURL
Turinici, Mihai Metric variants of the Brezis-Browder ordering principle. (English) Zbl 0702.54021 Demonstr. Math. 22, No. 1, 213-228 (1989). Reviewer: B.F.Smarda MSC: 54F05 06F30 PDF BibTeX XML Cite \textit{M. Turinici}, Demonstr. Math. 22, No. 1, 213--228 (1989; Zbl 0702.54021) Full Text: DOI OpenURL
Sidorowicz, Józef Heat diffraction on a smooth and convex domain in \(R^ 0\). (Russian) Zbl 0699.60055 Demonstr. Math. 22, No. 1, 79-84 (1989). Reviewer: J.Sidorowicz MSC: 60H99 35L99 35Q99 PDF BibTeX XML Cite \textit{J. Sidorowicz}, Demonstr. Math. 22, No. 1, 79--84 (1989; Zbl 0699.60055) Full Text: DOI OpenURL
Skwarczyński, Maciej Semigroups of nonexpanding mappings. (English) Zbl 0699.53047 Demonstr. Math. 22, No. 1, 241-247 (1989). Reviewer: W.Waliszewski MSC: 53C20 PDF BibTeX XML Cite \textit{M. Skwarczyński}, Demonstr. Math. 22, No. 1, 241--247 (1989; Zbl 0699.53047) OpenURL
Tatarkiewicz, Krzysztof Sur les trajectoires de certaines systèmes d’équations différo- fonctionnelles. (French) Zbl 0699.34067 Demonstr. Math. 22, No. 1, 29-41 (1989). Reviewer: A.Hamovici MSC: 34K99 34K05 PDF BibTeX XML Cite \textit{K. Tatarkiewicz}, Demonstr. Math. 22, No. 1, 29--41 (1989; Zbl 0699.34067) Full Text: DOI OpenURL
Sasin, Wiesław The de Rham cohomology of differential spaces. (English) Zbl 0698.58004 Demonstr. Math. 22, No. 1, 249-270 (1989). Reviewer: A.Dimca MSC: 58A40 58A12 58A10 14F40 PDF BibTeX XML Cite \textit{W. Sasin}, Demonstr. Math. 22, No. 1, 249--270 (1989; Zbl 0698.58004) Full Text: DOI OpenURL
Vu Van Hung On non-conditional stability of open difference patterns for parabolic partial differential equations. (English) Zbl 0697.65071 Demonstr. Math. 22, No. 1, 85-100 (1989). Reviewer: H.R.Schwarz MSC: 65M12 35K05 PDF BibTeX XML Cite \textit{Vu Van Hung}, Demonstr. Math. 22, No. 1, 85--100 (1989; Zbl 0697.65071) OpenURL
Pawlak, Ryszard Jerzy Variation of Darboux functions. (English) Zbl 0697.26006 Demonstr. Math. 22, No. 1, 115-128 (1989). Reviewer: L.Mišík MSC: 26B05 26B30 PDF BibTeX XML Cite \textit{R. J. Pawlak}, Demonstr. Math. 22, No. 1, 115--128 (1989; Zbl 0697.26006) Full Text: DOI OpenURL
Nowakowski, Andrzej; Zakrzewska, Danuta Variational problems and differential equations in Hilbert spaces. (English) Zbl 0696.49014 Demonstr. Math. 22, No. 1, 139-158 (1989). Reviewer: A.Nowakowski MSC: 49J27 35A15 PDF BibTeX XML Cite \textit{A. Nowakowski} and \textit{D. Zakrzewska}, Demonstr. Math. 22, No. 1, 139--158 (1989; Zbl 0696.49014) Full Text: DOI OpenURL
Felińska, Halina On some properties of the spherical bundle \(T_ 1{\L}_ 2\). (English) Zbl 0695.53012 Demonstr. Math. 22, No. 1, 67-72 (1989). Reviewer: M.de Leon MSC: 53B20 PDF BibTeX XML Cite \textit{H. Felińska}, Demonstr. Math. 22, No. 1, 67--72 (1989; Zbl 0695.53012) OpenURL
Pachpatte, B. G. On integral inequalities similar to Opial’s inequality. (English) Zbl 0694.26008 Demonstr. Math. 22, No. 1, 21-27 (1989). Reviewer: J.Rákosník MSC: 26D10 PDF BibTeX XML Cite \textit{B. G. Pachpatte}, Demonstr. Math. 22, No. 1, 21--27 (1989; Zbl 0694.26008) Full Text: DOI OpenURL
Grodzki, Zdzislaw; Latko, Marek The conjugated shift-registers. (English) Zbl 0693.94012 Demonstr. Math. 22, No. 1, 101-113 (1989). Reviewer: Jerzy Żurawiecki (Lublin) MSC: 94A55 PDF BibTeX XML Cite \textit{Z. Grodzki} and \textit{M. Latko}, Demonstr. Math. 22, No. 1, 101--113 (1989; Zbl 0693.94012) Full Text: DOI OpenURL
Siudut, Stanislaw Some fix-point theorems for the commutative iteration semigroups. (English) Zbl 0693.39003 Demonstr. Math. 22, No. 1, 159-166 (1989). Reviewer: G.Targonski MSC: 39A99 47H10 20M14 20M20 PDF BibTeX XML Cite \textit{S. Siudut}, Demonstr. Math. 22, No. 1, 159--166 (1989; Zbl 0693.39003) Full Text: DOI OpenURL
Sitarczyk, Czesław Idempotent polynomials over rings. (English) Zbl 0693.08002 Demonstr. Math. 22, No. 1, 193-201 (1989). Reviewer: B.Wojdyło MSC: 08A40 16U99 PDF BibTeX XML Cite \textit{C. Sitarczyk}, Demonstr. Math. 22, No. 1, 193--201 (1989; Zbl 0693.08002) Full Text: DOI OpenURL
Płonka, Jerzy On some decomposition of the sum of a direct system of algebras into a subdirect product. (English) Zbl 0693.08001 Demonstr. Math. 22, No. 1, 235-239 (1989). Reviewer: R.A.Alo MSC: 08A05 08B99 PDF BibTeX XML Cite \textit{J. Płonka}, Demonstr. Math. 22, No. 1, 235--239 (1989; Zbl 0693.08001) OpenURL
Kamara, M.; Schweigert, D. Geometric correlation lattices. (English) Zbl 0693.06008 Demonstr. Math. 22, No. 1, 167-177 (1989). Reviewer: J.Jakubík MSC: 06C10 PDF BibTeX XML Cite \textit{M. Kamara} and \textit{D. Schweigert}, Demonstr. Math. 22, No. 1, 167--177 (1989; Zbl 0693.06008) OpenURL
Hejduk, Jacek Convergence with respect to the Mycielski \(\sigma\)-ideal. (English) Zbl 0692.28002 Demonstr. Math. 22, No. 1, 43-50 (1989). Reviewer: J.Hejduk MSC: 28A20 PDF BibTeX XML Cite \textit{J. Hejduk}, Demonstr. Math. 22, No. 1, 43--50 (1989; Zbl 0692.28002) Full Text: DOI OpenURL
Łazarow, Ewa; Johnson, Roy A.; Wilczyński, Władysław Topologies related to sets having the Baire property. (English) Zbl 0692.28001 Demonstr. Math. 22, No. 1, 179-191 (1989). Reviewer: P.Kostyrko MSC: 28A05 26A03 26A21 PDF BibTeX XML Cite \textit{E. Łazarow} et al., Demonstr. Math. 22, No. 1, 179--191 (1989; Zbl 0692.28001) OpenURL
Studniarski, Marcin A simple derivation of sufficient conditions for a local minimum of a Lipschitzian function. (English) Zbl 0688.90057 Demonstr. Math. 22, No. 1, 73-78 (1989). MSC: 90C48 49K27 PDF BibTeX XML Cite \textit{M. Studniarski}, Demonstr. Math. 22, No. 1, 73--78 (1989; Zbl 0688.90057) Full Text: DOI OpenURL