In this paper, we give a generalization of a well-known result of Dirac that given any k vertices in a k-connected graph where k 2, there is a circuit containing all of them. We also generalize a result of Ha ggkvist and Thomassen. Our main result partially answers an open matroid question of Oxley.
A generalization of a theorem of A. Grothendieck
✍ Scribed by Oğuz Varol
- Publisher
- John Wiley and Sons
- Year
- 2007
- Tongue
- English
- Weight
- 217 KB
- Volume
- 280
- Category
- Article
- ISSN
- 0025-584X
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✦ Synopsis
Abstract
In this article we characterize the quasi‐barrelledness of the projective tensor product of a coechelon space of type one k ^1^(A) with a Fréchet space, including homological conditions as exactness properties of the corresponding tensor product functor k ^1^(A) ·: ℱ → ℒ︁, acting from the category of Fréchet spaces to the category of linear spaces, resp. the vanishing of its first right derivative Tor^1^~π~ (k ^1^(A),.). This generalizes and extends a classical theorem of A. Grothendieck ([13, Chap. II, §4, No. 3, Theorem 15]). Further we present an analogous theorem for complete coechelon spaces of type zero and the injective tensor product and results concerning the stronger property of barrelledness. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
📜 SIMILAR VOLUMES
## Abstract In this paper, we obtain an asymptotic generalization of Turán's theorem. We prove that if all the non‐trivial eigenvalues of a __d__‐regular graph __G__ on __n__ vertices are sufficiently small, then the largest __K__~__t__~‐free subgraph of __G__ contains approximately (__t__ − 2)/(__
Let R R be a ring of subsets of a nonempty set ⍀ and ⌺ R R the Banach space of uniform limits of sequences of R R-simple functions in ⍀. Let X be a quasicom-Ž . plete locally convex Hausdorff space briefly, lcHs . Given a bounded X-valued Ž . vector measure m on R R, the concepts of m-integrability