## Abstract We answer two questions of Zhu on circular choosability of graphs. We show that the circular list chromatic number of an even cycle is equal to 2 and give an example of a graph for which the infimum in the definition of the circular list chromatic number is not attained. Β© 2008 Wiley Pe
Questions about pesticides on foods
β Scribed by Robert J. Geller
- Publisher
- Springer-Verlag
- Year
- 2006
- Tongue
- English
- Weight
- 94 KB
- Volume
- 2
- Category
- Article
- ISSN
- 1556-9039
No coin nor oath required. For personal study only.
π SIMILAR VOLUMES
## Abstract CH implies that selective separability is not preserved by finite powers (solving [3, Problems 3.7 and 3.9]). In ZFC, selective separability does not imply Hβseparability (solving [4, Problem 34]) (Β© 2009 WILEYβVCH Verlag GmbH & Co. KGaA, Weinheim)
## Abstract __IPV__ is the intuitionistic theory axiomatized by Cook's equational theory __PV__ plus __PIND__ on __NP__βformulas. Two extensions of __IPV__ were introduced by Buss and by Cook and Urquhart by adding __PIND__ for formulas of the form __A__(__x__) β¨ __B__, respectively ¬¬__A__(__x__),