Results 21 to 30 of about 1,618 (64)

Topological and Geometric Obstructions on Einstein-Hilbert-Palatini Theories

, 2018
In this article we introduce $A$-valued Einstein-Hilbert-Palatini functional ($A$-EHP) over a n-manifold $M$, where $A$ is an arbitrary graded algebra, as a generalization of the functional arising in the study of the first order formulation of gravity ...
Biezuner, Rodney J., Martins, Yuri X.
core   +3 more sources

On the topological ranks of Banach ∗$^*$‐algebras associated with groups of subexponential growth

Bulletin of the London Mathematical Society, Volume 58, Issue 2, February 2026.
Abstract Let G$G$ be a group of subexponential growth and C→qG$\mathcal C\overset{q}{\rightarrow }G$ a Fell bundle. We show that any Banach ∗$^*$‐algebra that sits between the associated ℓ1$\ell ^1$‐algebra ℓ1(G|C)$\ell ^1(G\,\vert \,\mathcal C)$ and its C∗$C^*$‐envelope has the same topological stable rank and real rank as ℓ1(G|C)$\ell ^1(G\,\vert ...
Felipe I. Flores
wiley   +1 more source

Contractions of Low-Dimensional Lie Algebras

, 2006
Theoretical background of continuous contractions of finite-dimensional Lie algebras is rigorously formulated and developed. In particular, known necessary criteria of contractions are collected and new criteria are proposed.
Barut A. O., Borel A., Burde D., Burde D., Burde D., Campoamor-Stursberg R., Campoamor-Stursberg R., Carles R., Doebner H. D., Fialowski A., Gilmore R., Gorbatsevich V. V., Gorbatsevich V. V., Gorbatsevich V. V., Gorbatsevich V. V., Goze M., Grunewald F., Grunewald F., Havlicek M., Hegerfeldt G. C., Hermann R., Inönü E., Jacobson N., Kirillov A. A., Kirillov A. A., Kraft H., Lõhmus J., Lõhmus Ja. H., Maryna Nesterenko, Mubarakzyanov G. M., Mubarakzyanov G. M., Neretin Yu. A., Neretin Yu. A., Onishchik A. L., Patera J., Pogosyan G., Roman Popovych, Seeley C., Weimar-Woods E.   +38 more
core   +4 more sources

Alperin's bound and normal Sylow subgroups

Journal of the London Mathematical Society, Volume 113, Issue 2, February 2026.
Abstract Let G$G$ be a finite group, p$p$ a prime number and P$P$ a Sylow p$p$‐subgroup of G$G$. Recently, Malle, Navarro, and Tiep conjectured that the number of p$p$‐Brauer characters of G$G$ coincides with that of the normalizer NG(P)${\bf N}_G(P)$ if and only if P$P$ is normal in G$G$.
Zhicheng Feng, J. Miquel Martínez, Damiano Rossi   +2 more
wiley   +1 more source

Unification mechanism for gauge and spacetime symmetries

, 2017
A group theoretical mechanism for unification of local gauge and spacetime symmetries is introduced. No-go theorems prohibiting such unification are circumvented by slightly relaxing the usual requirement on the gauge group: only the so called Levi ...
Laszlo, Andras
core   +1 more source

Simultaneous Bosonic and Fermionic T‐Dualization of the Type II Superstring Theory—Buscher Approach and Double Space Representation

Fortschritte der Physik, Volume 74, Issue 1, January 2026.
Abstract In this article I consider type II superstring in the pure spinor formulation with constant background fields in the context of T‐dualization. First, I prove that bosonic and fermionic T‐dualization commute using already known T‐dual transformation laws for bosonic and fermionic T‐dualization.
B. Nikolić
wiley   +1 more source

Possible alternative mechanism to SUSY: conservative extensions of the Poincar\'e group

, 2018
A group theoretical mechanism is outlined, which can indecomposably extend the Poincar\'e group by the compact internal (gauge) symmetries at the price of allowing some nilpotent (or, more precisely: solvable) internal symmetries in addition.
AL Onishchik, G Hegerfeldt, J Wess, L. O'Raifeartaigh, M Ise, R Penrose, RM Wald, Sidney Coleman, W. D. McGlinn   +8 more
core   +1 more source

Coxeter's enumeration of Coxeter groups

Journal of the London Mathematical Society, Volume 113, Issue 1, January 2026.
Abstract In a short paper that appeared in the Journal of the London Mathematical Society in 1934, H. S. M. Coxeter completed the classification of finite Coxeter groups. In this survey, we describe what Coxeter did in this paper and examine an assortment of topics that illustrate the broad and enduring influence of Coxeter's paper on developments in ...
Bernhard Mühlherr, Richard M. Weiss
wiley   +1 more source

Extremal Multicenter Black Holes: Nilpotent Orbits and Tits Satake Universality Classes

, 2012
Four dimensional supergravity theories whose scalar manifold is a symmetric coset manifold U[D=4]/Hc are arranged into a finite list of Tits Satake universality classes. Stationary solutions of these theories, spherically symmetric or not, are identified
A Ceresole, A Ceresole, A Ceresole, A Ceresole, A Ceresole, A Dabholkar, A Ghosh, A Giryavets, A Sen, A Sen, A Sen, A Strominger, A Strominger, A Strominger, Alexander S. Sorin, B Pioline, B Wit de, B Wit de, B Wit de, B Wit de, B Wit de, B Wit de, C Hull, D Gaiotto, DH Collingwood, E Bergshoeff, E Bergshoeff, E Cremmer, F Larsen, G Arcioni, G Bossard, G Bossard, G Bossard, G Bossard, G Bossard, G Bossard, G Lopes Cardoso, G Lopes Cardoso, G Lopes Cardoso, GT Horowitz, GW Gibbons, GW Gibbons, JH Schwarz, JM Maldacena, K Behrndt, K Behrndt, K Goldstein, K Stelle, K Stelle, L Andrianopoli, L Andrianopoli, L Andrianopoli, L Andrianopoli, L Andrianopoli, L Andrianopoli, L Andrianopoli, L Andrianopoli, L Borsten, L Borsten, L Castellani, L Castellani, M Bertolini, M Bertolini, M Bertolini, M Bertolini, M Cvetič, M Duff, M Günaydin, M Günaydin, P Breitenlohner, P Fré, P Fré, P Fré, P Fré, P Fré’, Pietro Fré, PK Tripathy, R D’Auria, R D’Auria, R Kallosh, R Kallosh, R Kallosh, R Kallosh, R Kallosh, R Kallosh, R Kallosh, R Kallosh, S Bellucci, S Bellucci, S Cecotti, S Ferrara, S Ferrara, S Ferrara, S Ferrara, S-S Kim, SJ Gates Jr, W Chemissany, W Chemissany, W Chemissany, W Chemissany   +99 more
core   +1 more source

The m$m$‐step solvable anabelian geometry of mixed‐characteristic local fields

Journal of the London Mathematical Society, Volume 112, Issue 6, December 2025.
Abstract Let K$K$ be a mixed‐characteristic local field. For an integer m⩾0$m \geqslant 0$, we denote by Km/K$K^m / K$ the maximal m$m$‐step solvable extension of K$K$, and by GKm$G_K^m$ the maximal m$m$‐step solvable quotient of the absolute Galois group GK$G_K$ of K$K$.
Seung‐Hyeon Hyeon
wiley   +1 more source