Zobrazeno 1 - 10
of 51
pro vyhledávání: '"Dariusz Bugajewski"'
Publikováno v:
Journal of Function Spaces, Vol 2017 (2017)
We analyze topological properties of metric spaces obtained by using Száz’s construction, which we used to call generalized “linking construction.” In particular, we provide necessary and sufficient conditions for completeness of metric spaces
Externí odkaz:
https://doaj.org/article/2a095c12ed534dd480ad7972882705c2
Publikováno v:
International Journal of Mathematics and Mathematical Sciences, Vol 2004, Iss 61, Pp 3237-3247 (2004)
We deal with C(n)-almost periodic functions taking values in a Banach space. We give several properties of such functions, in particular, we investigate their behavior in view of differentiation as well as integration. The superposition operator acti
Externí odkaz:
https://doaj.org/article/d59077aca2db4355a76dfae0304c956d
Autor:
Dariusz Bugajewski, Rafael Espínola
Publikováno v:
Abstract and Applied Analysis, Vol 2003, Iss 2, Pp 111-119 (2003)
Externí odkaz:
https://doaj.org/article/42eed4f4231b4744ade64e40adf3fcda
Publikováno v:
Fixed Point Theory and Applications, Vol 2010 (2010)
We are going to answer some open questions in the theory of hyperconvex metric spaces. We prove that in complete ℝ-trees hyperconvex hulls are uniquely determined. Next we show that hyperconvexity of subsets of normed spaces implies their convexity
Externí odkaz:
https://doaj.org/article/b9d2d4fb85314706978a89e4973c3bfa
Publikováno v:
Annali di Matematica Pura ed Applicata (1923 -). 202:1033-1050
In this note we are going to continue investigation concerning the asymptotic behavior of some Levitan almost periodic functions or almost periodic functions in view of the Lebesgue measure as well as their convolutions with some functions naturally
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::340bd51b7815769df3d55d078ed34c2f
https://doi.org/10.1007/s10231-022-01270-2
https://doi.org/10.1007/s10231-022-01270-2
Autor:
Dariusz Bugajewski, Xiao-Xiong Gan
Publikováno v:
Communications in Algebra. 49:3232-3240
In this paper we provide necessary and sufficient conditions for a formal power series g over R or C to have formal power series g1/k such that (g1/k)k=g for all positive integers k or for some pos...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f98ff78b56961ad57bc62710aafcace7
https://doi.org/10.1080/00927872.2021.1892711
https://doi.org/10.1080/00927872.2021.1892711
Autor:
Dariusz Bugajewski, Ruidong Wang
Publikováno v:
Mathematica Slovaca. 70:135-146
In this paper, we give some necessary and sufficient conditions under which the topology generated by a partial metric is equivalent to the topology generated by a suitably defined metric. Next, we study some new extensions of the Generalized Banach
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e72a8abedff08ed03f17533e7dc99b0c
https://doi.org/10.1515/ms-2017-0338
https://doi.org/10.1515/ms-2017-0338
Autor:
Dariusz Bugajewski, Ruidong Wang
Publikováno v:
Annals of Functional Analysis. 11:523-539
The aim of this paper is to generalize the Wigner Theorem to real normed spaces. A normed space is said to have the Wigner Property if the Wigner Theorem holds for it. We prove that every two-dimensional real normed space has the Wigner Property. We
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7fcdb3e6b55d350b2ce23cbea9fc13f5
https://doi.org/10.1007/s43034-019-00035-y
https://doi.org/10.1007/s43034-019-00035-y
Autor:
Dariusz Bugajewski, Piotr Maćkowiak
Publikováno v:
Bulletin of the Australian Mathematical Society. 98:448-455
The aim of this note is to give a simple topological proof of the well-known result concerning continuity of roots of polynomials. We also consider a more general case with polynomials of a higher degree approaching a given polynomial. We then examin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::59650d564987839594455b05cb5cc27f
https://doi.org/10.1017/s0004972718000709
https://doi.org/10.1017/s0004972718000709
Publikováno v:
Journal of Fixed Point Theory and Applications. 19:2785-2818
In this paper we investigate autonomous as well as nonautonomous superposition operators acting between spaces of functions of bounded $$\Lambda $$ -variation. A particular emphasis is put on acting conditions as well as on continuity problems for su
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e00dcb15ae708de3e611f9b8cb6550ce
https://doi.org/10.1007/s11784-017-0450-0
https://doi.org/10.1007/s11784-017-0450-0