Results 61 to 70 of about 209,505 (214)

Why Is the Peak Group Analysis So Effective for IR Spectra Analysis?

open access: yesJournal of Chemometrics, Volume 40, Issue 4, April 2026.
ABSTRACT Peak group analysis (PGA), an MCR algorithm, has proven to be very successful in extracting pure component spectra and concentration profiles from IR and Raman spectral data when investigating carbonylation reactions with transition metal catalysts.
Klaus Neymeyr   +4 more
wiley   +1 more source

„Und wie gehen wir das nun an?“

open access: yesPraxisForschungLehrer*innenBildung
Das Forschungs- und Entwicklungsprojekt „Mathematik an der Laborschule: Auf dem Weg zu einem stufenübergreifenden Curriculum von 0–10“ befasst sich, ausgehend von einem wahrgenommenen Praxisproblem, mit der Kernfrage, wie ein durchgängiges Curriculum ...
Jan Wilhelm Dieckmann
doaj   +1 more source

The surrogate matrix methodology: A reference implementation for low-cost assembly in isogeometric analysis

open access: yesMethodsX, 2020
A reference implementation of a new method in isogeometric analysis (IGA) is presented. It delivers low-cost variable-scale approximations (surrogates) of the matrices which IGA conventionally requires to be computed by element-scale quadrature.
Daniel Drzisga   +2 more
doaj   +1 more source

Generalised Poincar\'e series and embedded resolution of curves

open access: yes, 2010
The purpose of this paper is to extend the notions of generalised Poincar\'e series and divisorial generalised Poincar\'e series (of motivic nature) introduced by Campillo, Delgado and Gusein-Zade for complex curve singularities to curves defined over ...
Moyano-Fernández, Julio José
core   +1 more source

Approximation of Dirac operators with δ‐shell potentials in the norm resolvent sense, II: Quantitative results

open access: yesMathematische Nachrichten, Volume 299, Issue 4, Page 704-763, April 2026.
Abstract This paper is devoted to the approximation of two‐ and three‐dimensional Dirac operators HV∼δΣ$H_{\widetilde{V} \delta _\Sigma }$ with combinations of electrostatic and Lorentz scalar δ$\delta$‐shell interactions in the norm resolvent sense. Relying on results from Behrndt, Holzmann, and Stelzer‐Landauer [Math. Nachr.
Jussi Behrndt   +2 more
wiley   +1 more source

Besov regularity for operator equations on patchwise smooth manifolds [PDF]

open access: yes, 2014
We study regularity properties of solutions to operator equations on patchwise smooth manifolds $\partial\Omega$ such as, e.g., boundaries of polyhedral domains $\Omega \subset \mathbb{R}^3$. Using suitable biorthogonal wavelet bases $\Psi$, we introduce
Dahlke, Stephan, Weimar, Markus
core  

Uniform growth in small cancellation groups

open access: yesJournal of the London Mathematical Society, Volume 113, Issue 4, April 2026.
Abstract An open question asks whether every group acting acylindrically on a hyperbolic space has uniform exponential growth. We prove that the class of groups of uniform uniform exponential growth acting acylindrically on a hyperbolic space is closed under taking certain geometric small cancellation quotients.
Xabier Legaspi, Markus Steenbock
wiley   +1 more source

Die Treffsicherheit von Auswahlkriterien für einen hypothetischen "Numerus Clausus"

open access: yesZeitschrift für Hochschulentwicklung, 2011
Auf der Grundlage einer prospektiven Studie zu den Faktoren des Studienerfolgs im Medizinstudium wurden Auswahlkriterien im Sinne eines hypothetischen Numerus clausus anhand der Schulleistungen berechnet.
Lukas Mitterauer   +2 more
doaj   +1 more source

Infinite Systems of Functional Equations and Gaussian Limiting Distributions [PDF]

open access: yesDiscrete Mathematics & Theoretical Computer Science, 2012
In this paper infinite systems of functional equations in finitely or infinitely many random variables arising in combinatorial enumeration problems are studied. We prove sufficient conditions under which the combinatorial random variables encoded in the
Michael Drmota   +2 more
doaj   +1 more source

f$f$‐Diophantine sets over finite fields via quasi‐random hypergraphs from multivariate polynomials

open access: yesMathematika, Volume 72, Issue 2, April 2026.
Abstract We investigate f$f$‐Diophantine sets over finite fields via new explicit constructions of families of quasi‐random hypergraphs from multivariate polynomials. In particular, our construction not only offers a systematic method for constructing quasi‐random hypergraphs but also provides a unified framework for studying various hypergraphs ...
Seoyoung Kim, Chi Hoi Yip, Semin Yoo
wiley   +1 more source

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