Results 21 to 30 of about 103 (99)

On central relations of complete lattices [PDF]

open access: yes, 1987
summary:We characterize lattices with a complemented tolerance lattice. As an application of our results we give a characterization of bounded weakly atomic modular lattices with a Boolean tolerance ...
Zelinka, Bohdan   +9 more
core   +1 more source

Counting 5‐isogenies of elliptic curves over Q$\mathbb {Q}$

open access: yesJournal of the London Mathematical Society, Volume 113, Issue 5, May 2026.
Abstract We show that the number of 5‐isogenies of elliptic curves defined over Q$\mathbb {Q}$ with naive height bounded by H>0$H > 0$ is asymptotic to C5·H1/6(logH)2$C_5\cdot H^{1/6} (\log H)^2$ for some explicitly computable constant C5>0$C_5 > 0$. This settles the asymptotic count of rational points on the genus zero modular curves X0(m)$\mathcal {X}
Santiago Arango‐Piñeros   +3 more
wiley   +1 more source

A categorification of combinatorial Auslander–Reiten quivers

open access: yesJournal of the London Mathematical Society, Volume 113, Issue 5, May 2026.
Abstract We provide a categorification of Oh and Suh's combinatorial Auslander–Reiten quivers in the simply laced case. We work within the perfectly valued derived category pvd(ΠQ)$\mathrm{pvd}(\Pi _Q)$ of the 2‐dimensional Ginzburg dg algebra of a Dynkin quiver Q$Q$.
Ricardo Canesin
wiley   +1 more source

Hitchhiker's Guide to the Swampland: The Cosmologist's Handbook to the String‐Theoretical Swampland Programme

open access: yesFortschritte der Physik, Volume 74, Issue 4, April 2026.
Abstract String theory has strong implications for cosmology, implying the absence of a cosmological constant, ruling out single‐field slow‐roll inflation, and that black holes decay. The origins of these statements are elucidated within the string‐theoretical swampland programme.
Kay Lehnert
wiley   +1 more source

Some properties of congurence relations on orthomodular lattices

open access: yes, 2001
In this paper congruences on orthomodular lattices are studied with particular regard to analogies in Boolean algebras. For this reason the lattice of p-ideals (corresponding to the congruence lattice) and the interplay between congruence classes is ...
Dorfer, Gerhard
core   +1 more source

Distribution of integer points on determinant surfaces and a mod‐p analogue

open access: yesMathematika, Volume 72, Issue 2, April 2026.
Abstract We establish an asymptotic formula for counting integer solutions with smooth weights to an equation of the form xy−zw=r$xy-zw=r$, where r$r$ is a non‐zero integer, with an explicit main term and a strong bound on the error term in terms of the size of the variables x,y,z,w$x, y, z, w$ as well as of r$r$.
Satadal Ganguly, Rachita Guria
wiley   +1 more source

Biases towards the zero residue class for quadratic forms in arithmetic progressions

open access: yesMathematika, Volume 72, Issue 2, April 2026.
Abstract We prove a bias towards the zero residue class in the distribution of the integers represented by binary quadratic forms. In most cases, we prove that the bias comes from a secondary term in an associated asymptotic expansion. This is unlike Chebyshev's bias, which exists somewhere at the level of O(x1/2+ε)$O(x^{1/2+\varepsilon })$.
Jeremy Schlitt
wiley   +1 more source

On Birkhoff's Problem 73 For Monoids

open access: yes, 1960
Birkhoff in [2] poses the following problem:“Problem 73. Find necessary and sufficient conditions in order that the correspondence between the congruence relations and the (neutral) ideals of a lattice be one-one”.This problem has been solved by Areškin [
Barron Brainerd
core   +1 more source

Um estudo sobre reticulados distributivos [PDF]

open access: yes, 2021
Dissertação de mestrado em MatemáticaNesta dissertação de mestrado, intitulada ”Um estudo sobre reticulados distributivos”, é desenvolvido um estudo sobre um dos ramos mais antigos da teoria de reticulados: os reticulados distributivos.
Gonçalves, João Manuel Guerra Fontes
core  

Selective Crystal Growth and Optical Responses of 2H and 3R Polytypes in van der Waals Polar Insulator α‐In2Se3

open access: yesAdvanced Optical Materials, Volume 14, Issue 7, 16 February 2026.
Selective growth protocols are established to obtain high‐quality bulk single crystals of the 2H and 3R polytypes of the vdW polar insulator α‐In2Se3, together with rapid, non‐destructive phase‐identification methods. Combined optical transmission and absolute reflectivity measurements, supported by DFT calculations, reveal distinct polytype‐dependent ...
Ryoga Murata, Takao Sasagawa
wiley   +1 more source

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