Gejza Jenča

Bratislava, Slovakia

http://www.math.sk/wiki/jenca

Mathematician.

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The category of posets

posets ct.category-theory reference-request asked Mar 16, 2012 at 15:53

mathoverflow.net

10 votes

Entangled permutations of a multiset

co.combinatorics asked Jul 22, 2011 at 21:48

mathoverflow.net

7 votes

What is this subclass of $k$-colorable graphs called?

co.combinatorics graph-theory terminology graph-colorings asked Oct 14, 2011 at 16:51

mathoverflow.net

7 votes

Intersections of complete k-partite graphs

graph-theory coloring asked Oct 12, 2011 at 22:15

math.stackexchange.com

6 votes

Are left adjoints a left adjoint?

ct.category-theory asked Mar 5, 2014 at 13:12

mathoverflow.net

5 votes

Coequalizers in an Eilenberg-Moore category

ct.category-theory universal-algebra monads asked Jul 29, 2013 at 21:43

mathoverflow.net

Top Answers

Is the fixed point property for posets preserved by products?

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Example of non-abelian partially ordered group

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Uniquely complemented lattice that is non-modular

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Are filters in lattices exactly the homomorphic preimages $\varphi^{-1}(1)$ of top elements?

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Does this property of a partially ordered set have a name?

mathoverflow.net

Where can I learn about the lattice of partitions?

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Is every surjective lattice homomorphism a split epimorphism?

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Drawing lattices

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Existence of maximal boolean-algebra sublattice (preserving top and bottom) of finite distributive lattice

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Does every orthocomplemented lattice satisfy the shuffle laws?

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Example of a bounded lattice that is NOT complete

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Is every sub-lattice of $\mathcal P(X)$ isomorphic to a sub-lattice of $\mathcal P(X')$ containing singleton sets?

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Tools for collaborative paper-writing

mathoverflow.net

Fundamental problems whose solution seems completely out of reach

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