Results 31 to 40 of about 3,708 (81)

Gromov–Witten invariants of bielliptic surfaces

open access: yesJournal of the London Mathematical Society, Volume 111, Issue 2, February 2025.
Abstract Bielliptic surfaces appear as a quotient of a product of two elliptic curves and were classified by Bagnera–Franchis. We give a concrete way of computing their GW‐invariants with point insertions using a floor diagram algorithm. Using the latter, we are able to prove the quasi‐modularity of their generating series by relating them to ...
Thomas Blomme
wiley   +1 more source

Effective elasto‐(visco)plastic coefficients of a bi‐phasic composite material with scale‐dependent size effects

open access: yesMathematical Methods in the Applied Sciences, Volume 48, Issue 1, Page 926-979, 15 January 2025.
We employ the theory of asymptotic homogenization (AH) to study the elasto‐plastic behavior of a composite medium comprising two solid phases, separated by a sharp interface and characterized by mechanical properties, such as elastic coefficients and “initial yield stresses” (i.e., a threshold stress above which remodeling is triggered), that may ...
Alessandro Giammarini   +2 more
wiley   +1 more source

The Semigroups B\u3csub\u3e2\u3c/sub\u3e and B\u3csub\u3e0\u3c/sub\u3e are Inherently Nonfinitely Based, as Restriction Semigroups [PDF]

open access: yes, 2013
The five-element Brandt semigroup B2 and its four-element subsemigroup B0, obtained by omitting one nonidempotent, have played key roles in the study of varieties of semigroups.
Jones, Peter R.
core   +1 more source

Lattice Dynamics of LiNb1–x Ta x O3 Solid Solutions: Theory and Experiment

open access: yesphysica status solidi (a), Volume 222, Issue 1, January 2025.
A joint experimental–theoretical approach allows to unambiguously assign the spectral features in the lithium niobate tantalate material family through both Raman and infrared spectroscopy, and provides an in‐depth explanation for the observed scattering efficiencies based on first‐principles calculations.
Felix Bernhardt   +10 more
wiley   +1 more source

Cryptanalysis on Two Kinds of Number Theoretic Pseudo‐Random Generators Using Coppersmith Method

open access: yesIET Information Security, Volume 2025, Issue 1, 2025.
Pseudo‐random number generator (PRNG) is a type of algorithm that generates a sequence of random numbers using a mathematical formula, which is widely used in computer science, such as simulation, modeling applications, data encryption, et cetera. The efficiency and security of PRNG are closely related to its output bits at each iteration.
Ran Zhang   +4 more
wiley   +1 more source

Growth functions of periodic space tessellations

open access: yesActa Crystallographica Section A, Volume 81, Issue 1, Page 64-81, January 2025.
For any periodic tilings of the plane by congruent polygons, growth functions are derived that count the numbers of vertices, edges and faces as the coverage expands. The functions are computed as polynomial formulas in a Python program and analyzed graphically using orphic diagrams.This work analyzes the rules governing the growth of the numbers of ...
Bartosz Naskręcki   +3 more
wiley   +1 more source

Shaping states into nations: The effects of ethnic geography on state borders

open access: yesAmerican Journal of Political Science, Volume 69, Issue 1, Page 132-147, January 2025.
Abstract Borders define states, yet little systematic evidence explains where they are drawn. Putting current challenges to state borders into perspective and breaking new methodological ground, this paper analyzes how ethnic geography and nationalism have shaped European borders since the 19th century.
Carl Müller‐Crepon   +2 more
wiley   +1 more source

Soft Substructures in Quantales and Their Approximations Based on Soft Relations. [PDF]

open access: yesComput Intell Neurosci, 2022
Zhou H   +5 more
europepmc   +1 more source

An Euler system for GU(2, 1). [PDF]

open access: yesMath Ann, 2022
Loeffler D, Skinner C, Zerbes SL.
europepmc   +1 more source

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