Results 101 to 110 of about 118,465 (290)
Which singular tangent bundles are isomorphic?
Journal of the London Mathematical Society, Volume 113, Issue 5, May 2026.Abstract Logarithmic and b$ b$‐tangent bundles provide a versatile framework for addressing singularities in geometry. Introduced by Deligne and Melrose, these modified bundles resolve singularities by reframing singular vector fields as well‐behaved sections of these singular bundles.
Eva Miranda, Pablo Nicolás
wiley +1 more source
Open Mathematics, 2020 A Cayley graph Γ\Gamma on a group G is called a dual Cayley graph on G if the left regular representation of G is a subgroup of the automorphism group of Γ\Gamma (note that the right regular representation of G is always an automorphism group of Γ ...
Pan Jiangmin
doaj +1 more source
Assembling homology classes in automorphism groups of free groups [PDF]
, 2015 The observation that a graph of rank n can be assembled from graphs of smaller rank k with s leaves by pairing the leaves together leads to a process for assembling homology classes for Out(Fn) and Aut(Fn) from classes for groups Γk,s, where the Γk,s ...
James F. Conant +3 more
semanticscholar +1 more source
Entrywise transforms preserving matrix positivity and nonpositivity
Journal of the London Mathematical Society, Volume 113, Issue 5, May 2026.Abstract We characterize real and complex functions which, when applied entrywise to square matrices, yield a positive definite matrix if and only if the original matrix is positive definite. We refer to these transformations as sign preservers. Compared to the classical work on entrywise preservers by Schoenberg and others, we completely resolve this ...
Dominique Guillot +3 more
wiley +1 more source
Automorphism Groups of Geometrically Represented Graphs [PDF]
, 2015 We describe a technique to determine the automorphism group of a geometrically represented graph, by understanding the structure of the induced action on all geometric representations.
Klavík, Pavel, Zeman, Peter
core
Automorphism Groups of Free Soluble Groups
Journal of Algebra, 1995 Let \(F\) be a free soluble group of derived length \(k\) and rank \(m\) and \(\Phi\) any group of automorphisms of \(F\). The author's Theorem A is that \(\Phi\) contains either a free subgroup of rank 2 or a soluble normal subgroup of finite index and derived length bounded by functions of \(k\) and \(m\) only.
openaire +2 more sources
CHARACTERIZING AUTOMORPHISM GROUPS OF ORDERED ABELIAN GROUPS
Bulletin of the London Mathematical Society, 2003 We characterize the groups isomorphic to full automorphism groups of ordered abelian groups. The result will follow from classical theorems on ordered groups adding an argument from proofs used to realize rings as endomorphism rings of abelian groups.
Göbel, Rüdiger, Shelah, Saharon
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The discriminant controls automorphism groups of noncommutative algebras [PDF]
, 2014 We use the discriminant to determine the automorphism groups of some noncommutative algebras, and we prove that a family of noncommutative algebras has tractable automorphism groups.
Seçil Çeken +3 more
semanticscholar +1 more source
Fortschritte der Physik, Volume 74, Issue 4, April 2026.ABSTRACT In this paper, we continue the development of the Cartan neural networks programme, launched with three previous publications, by focusing on some mathematical foundational aspects that we deem necessary for our next steps forward. The mathematical and conceptual results are diverse and span various mathematical fields, but the inspiring ...
Pietro Fré +4 more
wiley +1 more source
The divisibility conjecture for automorphism groups of finite p-groups [PDF]
Advances in Group Theory and Applications, 2020 Jill Dietz
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