Results 21 to 30 of about 70 (68)
Stable equivalence relations on 4‐manifolds
Proceedings of the London Mathematical Society, Volume 131, Issue 5, November 2025.Abstract Kreck's modified surgery gives an approach to classifying smooth 2n$2n$‐manifolds up to stable diffeomorphism, that is, up to connected sum with copies of Sn×Sn$S^n \times S^n$. In dimension 4, we use a combination of modified and classical surgery to study various stable equivalence relations which we compare to stable diffeomorphism.
Daniel Kasprowski +2 more
wiley +1 more source
Spatial modeling of crime dynamics: Patch and reaction–diffusion compartmental systems
Mathematical Methods in the Applied Sciences, Volume 48, Issue 7, Page 7440-7459, 15 May 2025.We study the dynamics of abstract models for crime evolution. The population is divided into three compartments, taking into account the participation in crime and incarceration. Individuals transit between the three segments, assuming that having more contact with criminally active people increases one's risk of learning and acquiring the same traits;
Julia Calatayud +2 more
wiley +1 more source
A Pair of Generalized (α, α)‐Derivations With Identities Related to Prime Ideals
Journal of Mathematics, Volume 2025, Issue 1, 2025.Let A be an arbitrary ring, α an automorphism of A, I a nonzero ideal of A, and ϒ a prime ideal of A satisfying the condition ϒ⊊αI. This research investigates the interplay between two generalized (α, α)‐derivations, Ω and G (associated with (α, α)‐derivations f and h, respectively), and the resulting characteristics of the quotient ring A/ϒ.
Ali Yahya Hummdi +4 more
wiley +1 more source
Annalen der Physik, Volume 536, Issue 3, March 2024.Readers familiar with Noether's Theorem, relating group symmetries to conserved quantities, may well wonder why the plural form in the title. The reason: her famous paper from 1918 contains not one, but two fundamental theorems. The first relates to special relativity, whereas the second pertains to Einstein's general theory based on the principle of ...
David E. Rowe
wiley +1 more source
, 2000 summary:A survey of the basic results of loop characters is given on the lines of the treatment of the author and J.D.H. Smith for characters of quasigroups, including some recent deveploments.
Johnson, Kenneth W., Kenneth W. Johnson
core
, 2017 Let $Y$ be a principal homogeneous space of an abelian surface, or a K3 surface, over a finitely generated extension of $\mathbb{Q}$. In 2008, Skorobogatov and Zarhin showed that the Brauer group modulo algebraic classes $\mathrm{Br}{Y}/ \mathrm{Br}_1{Y}$
Viray, Bianca
core
Geometrical aspects of spinor and twistor analysis [PDF]
This work is concerned with two examples of the interactions between differential geometry and analysis, both related to spinors. The first example is the Dirac operator on conformal spin manifolds with boundary.
Calderbank, David M. J.
core
Spinors, embeddings and gravity
, 1988 This thesis is concerned with the theory of spinors, embeddings and everywhere invariance with applications to general relativity. The approach is entirely geometric with particular emphasis on the use of natural structures.
Swift, S.T, Swift, Simon
core
Brauer and partition diagram models for phylogenetic trees and forests. [PDF]
Proc Math Phys Eng Sci, 2022 Francis A, Jarvis PD.
europepmc +1 more source
Ordinary varieties with trivial canonical bundle are not uniruled. [PDF]
Math Ann, 2021 Patakfalvi Z, Zdanowicz M.
europepmc +1 more source