Results 31 to 40 of about 656 (169)

Toward Kitaev's sixteenfold way in a honeycomb lattice model

Physical Review Research, 2020
Kitaev's sixteenfold way is a classification of exotic topological orders in which Z_{2} gauge theory is coupled to Majorana fermions of Chern number C. The 16 distinct topological orders within this class, depending on Cmod16, possess a rich variety of ...
Shang-Shun Zhang, Cristian D. Batista, Gábor B. Halász   +2 more
doaj   +1 more source

On a Theorem of Ziv Ran concerning Abelian Varieties Which Are Product of Jacobians

Journal of Mathematics, 2015
We give a new proof for a theorem of Ziv Ran which generalizes some results of Matsusaka and Hoyt. These results provide criteria for an Abelian variety to be a Jacobian or a product of Jacobians. The advantage of our method is that it works in arbitrary
Cristian Anghel, Nicolae Buruiana
doaj   +1 more source

Detectable gravitational wave signals from inflationary preheating

Physics Letters B, 2023
We consider gravitational wave (GW) production during preheating in hybrid inflation models where an axion-like waterfall field couples to Abelian gauge fields.
Yanou Cui, Evangelos I. Sfakianakis
doaj   +1 more source

Note on quasivarieties generated by finite pointed abelian groups

Open Mathematics
We prove that a finite pointed abelian group generates a finitely axiomatizable variety that has a finite quasivariety lattice. As a consequence, we obtain that a quasivariety generated by a finite pointed abelian group has a finite basis of quasi ...
Basheyeva Ainur, Lutsak Svetlana
doaj   +1 more source

Miyaoka–Yau inequalities and the topological characterization of certain klt varieties

Comptes Rendus. Mathématique
Ball quotients, hyperelliptic varieties, and projective spaces are characterized by their Chern classes, as the varieties where the Miyaoka–Yau inequality becomes an equality.
Greb, Daniel, Kebekus, Stefan, Peternell, Thomas   +2 more
doaj   +1 more source

Cycles on abelian varieties [PDF]

Proceedings of the American Mathematical Society, 1958
The object of this paper is to study the algebraic homology with rational coefficients of the general complex abelian variety. By this we mean an n-dimensional complex torus whose period matrix satisfies no relations other than the Riemann relations.
openaire   +2 more sources

The equations of singular loci of ample divisors on (subvarieties of) abelian varieties

Le Matematiche, 2008
In this paper we consider ideal sheaves associated to the singular loci of a divisor in a linear system |L| of an ample line bundle on a complex abelian variety.
Luigi Lombardi, Francesco Malaspina
doaj  

Quasi-abelian and quasi-solvable regular semigroups

Le Matematiche, 1996
In this note quasi-abelian semigroups are studied and it is proved that they form an e-variety of orthodox semigroups. More, quasi-abelian regular Bruck-Reilly monoids are characterized as extensions of monoids which are (reverse) semidirect products of ...
Brunetto Piochi
doaj  

Discrete Wilson Lines in F-Theory

Advances in High Energy Physics, 2011
F-theory models are constructed where the 7 -brane has a nontrivial fundamental group. The base manifolds used are a toric Fano variety and a smooth toric threefold coming from a reflexive polyhedron.
Volker Braun
doaj   +1 more source

Higher Extensions of Abelian Varieties [PDF]

Nagoya Mathematical Journal, 1968
In this paper we prove:THEOREM: Let k be an algebraically closed field of characteristic p > 0, and let X and Y be abelian varieties over k. Then the group Ext2(X, Y) = 0.
Oort, Frans, Oda, Tadao
openaire   +3 more sources