Filtry
A. Kotlov : Matchings and Hadwiger's conjecture
A review of article A. Kotlov : Matchings and Hadwiger's conjecture, Discrete Math. 244, No.1-3, 241-252(2002).
BA - Obecná matematika
- 2002 •
- Jx
Rok uplatnění
Jx - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)
The uncountable Hadwiger conjecture and characterizations of trees using graphs
We prove that the existence of a non-special tree of size λ is equivalent to the existence of an uncountably chromatic graph with no Kω1 minor of size λ, establishing a connection between the special tree number and the uncountable Hadwiger ...
Pure mathematics
- 2024 •
- Jimp •
- Odkaz
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Jimp - Článek v periodiku v databázi Web of Science
Výsledek na webu
On a new reformulation of Hadwiger's conjecture
Assuming that every proper minor closed class of graphs contains a maximum with respect to the homomorphism order, we prove that such a maximum must be homomorphically equivalent to a complete graph. This proves that Hadwiger's conjectur...
BA - Obecná matematika
- 2006 •
- Jx
Rok uplatnění
Jx - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)
Homomorphisms of Signed Graphs
The paper studies a new concept of homomorphisms on signed graphs. It establishes essential results and states several conjectures and open problems....
BA - Obecná matematika
- 2015 •
- Jx •
- Odkaz
Rok uplatnění
Jx - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)
Výsledek na webu
Cuts and Bounds
Determines cuts and bounds for frequntly studied classes of graphs and relational structures in relationship to e.g. Hadwigers conjecture....
BA - Obecná matematika
- 2005 •
- Jx
Rok uplatnění
Jx - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)
Coloring rings
for this larger class of graphs, and we also verify Hadwiger's conjecture for it.
Computer sciences, information science, bioinformathics (hardware development to be 2.2, social aspect to be 5.8)
- 2021 •
- Jimp •
- Odkaz
Rok uplatnění
Jimp - Článek v periodiku v databázi Web of Science
Výsledek na webu
?With your eyes I want to see into sky? ? On the way of Hartmut Geerken?s research to Victor Hadwiger ...
?With your eyes I want to see into sky? ? On the way of Hartmut Geerken?s research to Victor Hadwiger ...
AI - Jazykověda
- 2008 •
- D
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D - Stať ve sborníku
"Es geht ein Feiern an..." On the occasion of the 100th Anniversary of the Prague writer Victor Hadwider
This article gives an insight in to the life and work of Prague writer Victor Hadwiger, whose 100th anniversary of death was commemoraited in 2011. In addition to biographical and bibliographical information Hadwiger's position with...
AJ - Písemnictví, mas–media, audiovize
- 2011 •
- Jx
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Jx - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)
Chromatic number and complete graph substructures for degree sequences
a collectionof disjoint stars. This bound is an analogue of the Hajós Conjecture for degree sequences and, in particular, settles a conjecture of Neil Robertson that degree in D. The latter inequality is related to a conjecture...
BA - Obecná matematika
- 2013 •
- Jx •
- Odkaz
Rok uplatnění
Jx - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)
Výsledek na webu
"Things will happen above us" - to the lyrical work of Victor Hadwiger
The first part of the scientific study presents the life path and literary contribution of Prague German-writing author Victor Hadwiger, the second part is devoted to literary analysis and commentaries on two poems (Ich bin; Der Wanderer )....
AJ - Písemnictví, mas–media, audiovize
- 2016 •
- C
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C - Kapitola v odborné knize
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