Results 71 to 80 of about 83,964 (235)

The conjugacy problem for ascending HNN‐extensions of free groups

Proceedings of the London Mathematical Society, Volume 131, Issue 4, October 2025.
Abstract We give an algorithm to solve the Conjugacy Problem for ascending HNN‐extensions of free groups. To do this, we give algorithms to solve certain problems on dynamics of free group endomorphisms.
Alan D. Logan
wiley   +1 more source

On the cubical geometry of Higman's group

, 2016
We investigate the cocompact action of Higman's group on a CAT(0) square complex associated to its standard presentation. We show that this action is in a sense intrinsic, which allows for the use of geometric techniques to study the endomorphisms of the
Martin, Alexandre
core   +1 more source

Functorial constructions related to double Poisson vertex algebras

Journal of the London Mathematical Society, Volume 112, Issue 3, September 2025.
Abstract For any double Poisson algebra, we produce a double Poisson vertex algebra using the jet algebra construction. We show that this construction is compatible with the representation functor which associates to any double Poisson (vertex) algebra and any positive integer a Poisson (vertex) algebra.
Tristan Bozec, Maxime Fairon, Anne Moreau   +2 more
wiley   +1 more source

The diagonal p$p$‐permutation functor kRk$kR_k$

Journal of the London Mathematical Society, Volume 112, Issue 3, September 2025.
Abstract Let k$k$ be an algebraically closed field of positive characteristic p$p$. We describe the full lattice of subfunctors of the diagonal p$p$‐permutation functor kRk$kR_k$ obtained by k$k$‐linear extension from the functor Rk$R_k$ of linear representations over k$k$. This leads to the description of the “composition factors” SP$S_P$ of kRk$kR_k$,
Serge Bouc
wiley   +1 more source

Characterizations of normal cancellative monoids

AIMS Mathematics
Normal cancellative monoids were introduced to explore the general structure of cancellative monoids, which are innovative and open up new possibilities.
Hui Chen
doaj   +1 more source

Relative twisting in Outer space

, 2012
Subsurface projection has become indispensable in studying the geometry of the mapping class group and the curve complex of a surface. When the subsurface is an annulus, this projection is sometimes called relative twisting.
Clay, Matt, Pettet, Alexandra
core   +1 more source

Thurston obstructions and tropical geometry

Bulletin of the London Mathematical Society, Volume 57, Issue 8, Page 2404-2428, August 2025.
Abstract We describe an application of tropical moduli spaces to complex dynamics. A post‐critically finite branched covering φ$\varphi$ of S2$S^2$ induces a pullback map on the Teichmüller space of complex structures of S2$S^2$; this descends to an algebraic correspondence on the moduli space of point‐configurations of P1$\mathbb {P}^1$.
Rohini Ramadas
wiley   +1 more source

General infinitesimal variations of the Hodge structure of ample curves in surfaces

Mathematische Nachrichten, Volume 298, Issue 7, Page 2282-2308, July 2025.
Abstract Given a smooth projective complex curve inside a smooth projective surface, one can ask how its Hodge structure varies when the curve moves inside the surface. In this paper, we develop a general theory to study the infinitesimal version of this question in the case of ample curves.
Víctor González‐Alonso, Sara Torelli
wiley   +1 more source

Twists of trigonometric sigma models

Journal of High Energy Physics
We introduce the ℤ N -twisted trigonometric sigma models, a new class of integrable deformations of the principal chiral model. Starting from 4d Chern-Simons theory on a cylinder, the models are constructed by introducing a ℤ N branch cut running along ...
Rashad Hamidi, Ben Hoare
doaj   +1 more source

The automorphism group of accessible groups

, 2010
In this article, we study the outer automorphism group of a group G decomposed as a finite graph of group with finite edge groups and finitely generated vertex groups with at most one end.
Carette, Mathieu
core   +1 more source