Results 131 to 140 of about 14,220,135 (261)
Inverse problems for semilinear elliptic PDE with a general nonlinearity a(x,u)$a(x,u)$
Transactions of the London Mathematical Society, Volume 13, Issue 1, December 2026.Abstract This article studies the inverse problem of recovering a nonlinearity in an elliptic equation Δu+a(x,u)=0$\Delta u + a(x,u) = 0$ from boundary measurements of solutions. Previous results based on first‐order linearization achieve this under a sign condition on ∂ua(x,u)$\partial _u a(x,u)$, and results based on higher order linearization ...
David Johansson +2 more
wiley +1 more source
A Data‐Driven Review of Geoscience Research Evolution Using SciBERT‐Based Topic and Network Analysis
Geoscience Data Journal, Volume 13, Issue 4, October 2026.This review synthesises the evolution of global geoscience research from 2004 to 2023 using large‐scale bibliometric evidence. By combining keyword co‐occurrence network analysis with SciBERT‐based topic modelling, it identifies major paradigm transitions from geology‐centred research to climate‐focused studies and recent data‐ and AI‐driven ...
Sooyeon Han, Ju‐seop Kim
wiley +1 more source
BRIEF VON REBECKA LEJEUNE DIRICHLET, ERNST GUSTAV PAUL DIRICHLET UND FLORA LEJEUNE DIRICHLET AN PETER GUSTAV LEJEUNE DIRICHLET Brief von Rebecka Lejeune Dirichlet, Ernst Gustav Paul Dirichlet und Flora Lejeune Dirichlet an Peter Gustav Lejeune Dirichlet
Lejeune Dirichlet, Rebecka +3 more
core +1 more source
Brief von Rebecka Lejeune Dirichlet an Walter Arnold Abraham Dirichlet und Anna Dirichlet
BRIEF VON REBECKA LEJEUNE DIRICHLET AN WALTER ARNOLD ABRAHAM DIRICHLET UND ANNA DIRICHLET Brief von Rebecka Lejeune Dirichlet an Walter Arnold Abraham Dirichlet und Anna Dirichlet ( -
Dirichlet, Walter Arnold Abraham +2 more
core +1 more source
Bounded exponential sums with multiplicative coefficients
Mathematika, Volume 72, Issue 4, October 2026.Abstract We investigate when the exponential sum Sf(x,α):=∑n⩽xf(n)e(nα)$S_f(x,\alpha) := \sum _{n\leqslant x}f(n)\mathrm{e}(n\alpha)$ is bounded, for a multiplicative function f$f$ and α∈R$\alpha \in \mathbb {R}$. We show that under natural assumptions, Sf(x,α)$S_f(x,\alpha)$ is bounded only when f$f$ is very close to a twisted Dirichlet character χ(n ...
Péa Bazin, Ihor Pylaiev, Fred Tyrrell
wiley +1 more source
Brief von Rebecka Lejeune Dirichlet an Peter Gustav Lejeune Dirichlet und Flora Lejeune Dirichlet
BRIEF VON REBECKA LEJEUNE DIRICHLET AN PETER GUSTAV LEJEUNE DIRICHLET UND FLORA LEJEUNE DIRICHLET Brief von Rebecka Lejeune Dirichlet an Peter Gustav Lejeune Dirichlet und Flora Lejeune Dirichlet ( -
Lejeune Dirichlet, Rebecka +2 more
core +1 more source
Abelian number fields with frobenian conditions
Mathematika, Volume 72, Issue 4, October 2026.Abstract We study the distribution of abelian number fields with frobenian conditions imposed on the conductor. In particular, we find an asymptotic for the number of abelian field extensions of a number field k$k$ whose conductor is the sum of two squares. We also discuss an application of the Brauer group of stacks to quadratic number fields.
Julie Tavernier
wiley +1 more source
Brief von Rebecka Lejeune Dirichlet und Flora Lejeune Dirichlet an Peter Gustav Lejeune Dirichlet
BRIEF VON REBECKA LEJEUNE DIRICHLET UND FLORA LEJEUNE DIRICHLET AN PETER GUSTAV LEJEUNE DIRICHLET Brief von Rebecka Lejeune Dirichlet und Flora Lejeune Dirichlet an Peter Gustav Lejeune Dirichlet ( -
Lejeune Dirichlet, Rebecka +2 more
core +1 more source
Microstructure modeling and computational micromechanics of glued metallic hollow-sphere composites. [PDF]
Arch Appl MechJabs L +4 more
europepmc +1 more source