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Construction of Mendelsohn designs by using quasigroups of (2,q)-varieties
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- Let $q$ be a positive integer. An algebra is said to have the property $(2,q)$ if all of its subalge...
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10.14712/1213-7243.2015.183
- 作 者：
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Lidija Goračinova-Il...
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Commentationes mathematicae Universitatis Carolinae
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The Rothberger property on $C_p(\Psi(\mathcal A),2)$
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- A space $X$ is said to have the {\it Rothberger property\/} (or simply $X$ is {\it Rothberger}) if f...
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10.14712/1213-7243.2015.145
- 作 者：
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Daniel Bernal-Santos...
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- 期刊标题：
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Commentationes mathematicae Universitatis Carolinae
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Separable $\aleph_k$-free modules with almost trivial dual
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- An $R$-module $M$ has an almost trivial dual if there are no epimorphisms from $M$ to the free $R$-m...
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10.14712/1213-7243.2015.150
- 作 者：
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Daniel Herden
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- 期刊标题：
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Commentationes mathematicae Universitatis Carolinae
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A note on the commutator of two operators on a locally convex space
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- Denote by $C$ the commutator $AB-BA$ of two bounded operators $A$ and $B$ acting on a locally convex...
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10.14712/1213-7243.2015.155
- 作 者：
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Edvard Kramar
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- 期刊标题：
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Commentationes mathematicae Universitatis Carolinae
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On $\tau$-extending modules
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- In this paper we introduce the concept of $\tau$-extending modules by $\tau$-rational submodules and...
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10.14712/1213-7243.2015.172
- 作 者：
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Y. Talebi
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- 期刊标题：
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Commentationes mathematicae Universitatis Carolinae
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Remarks on $LBI$-subalgebras of $C(X)$
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- Let $A(X)$ denote a subalgebra of $C(X)$ which is closed under local bounded inversion, briefly, an ...
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10.14712/1213-7243.2015.158
- 作 者：
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Mehdi Parsinia
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- 期刊标题：
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Commentationes mathematicae Universitatis Carolinae
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Mechanical oscillators with dampers defined by implicit constitutive relations
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- We study the vibrations of lumped parameter systems, the spring being defined by the classical linea...
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10.14712/1213-7243.2015.143
- 作 者：
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Dalibor Pražák
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- 期刊标题：
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Commentationes mathematicae Universitatis Carolinae
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Isotopy invariant quasigroup identities
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- According to S.~Krsti\'c, there are only four quadratic varieties which are closed under isotopy. We...
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10.14712/1213-7243.2015.179
- 作 者：
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Aleksandar Krapež
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- 期刊标题：
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Commentationes mathematicae Universitatis Carolinae
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Interaction between cellularity of Alexandroff spaces and entropy of generalized shift maps
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- In the following text for a discrete finite nonempty set $K$ and a self-map $\varphiX\to X$ we inves...
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10.14712/1213-7243.2015.174
- 作 者：
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Fatemah Ayatollah Za...
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- 期刊标题：
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Commentationes mathematicae Universitatis Carolinae
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Notes on strongly Whyburn spaces
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- We introduce the notion of a strongly Whyburn space, and show that a space $X$ is strongly Whyburn i...
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10.14712/1213-7243.2015.139
- 作 者：
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Masami Sakai
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- 期刊标题：
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Commentationes mathematicae Universitatis Carolinae
