Zobrazeno 1 - 7
of 7
pro vyhledávání: '"Wolfram Hojka"'
Autor:
Wolfgang Herfort, Wolfram Hojka
Publikováno v:
Israel Journal of Mathematics. 247:993-998
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8ff71459e54d07c7c87a7f93ea582d7d
https://doi.org/10.1007/s11856-022-2295-5
https://doi.org/10.1007/s11856-022-2295-5
Autor:
Wolfgang Herfort, Wolfram Hojka
Publikováno v:
Israel Journal of Mathematics. 221:275-290
The classical concept of cotorsion of an abelian group is here characterized in the style of algebraic compactness, namely by the existence of solutions of certain systems of equations. This approach further highlights the close relation between the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9a1201099bc2dd7d56372b6c587a092f
https://doi.org/10.1007/s11856-017-1566-z
https://doi.org/10.1007/s11856-017-1566-z
Autor:
Wolfram Hojka
Publikováno v:
Journal of Algebra. 437:44-51
The harmonic archipelago is an important example of a two-dimensional topological space, whose fundamental group displays unusual properties. This group can also be described as a quotient of two different products, a representation somewhat akin to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ceface601e42462ae12d96a21fee86d2
https://doi.org/10.1016/j.jalgebra.2015.04.014
https://doi.org/10.1016/j.jalgebra.2015.04.014
Autor:
Wolfram Hojka, Gregory R. Conner
Publikováno v:
Mathematische Zeitschrift. 277:1073-1083
Guided by classical concepts, we define the notion of \emph{ends} of an iterated function system and prove that the number of ends is an upper bound for the number of nondegenerate components of its attractor. The remaining isolated points are then l
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ea454157aa34498c56c908e4ebf21f89
https://doi.org/10.1007/s00209-014-1294-6
https://doi.org/10.1007/s00209-014-1294-6
Autor:
Wolfram Hojka, Wolfgang Herfort
Publikováno v:
Groups, Modules, and Model Theory-Surveys and Recent Developments ISBN: 9783319517179
For the topologist’s product \(\circledast _{i}G_{i}\) where each G i is the group of p elements, a description of its abelianization is provided. It turns out that the latter is isomorphic to \(\left (\bigoplus _{i}\mathbb{Z}(p)\right ) \oplus P/S
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ca2b01bac54dda94919628010eab3ed4
https://doi.org/10.1007/978-3-319-51718-6_19
https://doi.org/10.1007/978-3-319-51718-6_19
The classical archipelago is a non-contractible subset of R 3 \mathbb {R}^3 which is homeomorphic to a disk except at one non-manifold point. Its fundamental group, A \mathscr {A} , is the quotient of the topologist’s product of Z \mathbb Z , the f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::12c91455b8d52f7f2f8f943c345d6488
Autor:
W. Herfort, Wolfram Hojka
Publikováno v:
Ischia Group Theory 2006.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::590d8b66aeaa5f830dda19d2619ae084
https://doi.org/10.1142/9789812708670_0016
https://doi.org/10.1142/9789812708670_0016