Results 31 to 40 of about 195 (135)
Chemistry – A European Journal, Volume 32, Issue 15, 22 April 2026.ABSTRACT Molecules that violate Hund's rule by exhibiting an inverted singlet–triplet gap (STG), where the first excited singlet (S1${\rm S}_1$) lies below the triplet (T1${\rm T}_1$), are rare but hold great promise as efficient fifth‐generation light emitters.
Atreyee Majumdar +1 more
wiley +1 more source
Fortschritte 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
Pfister's local-global principle for Azumaya algebras with involution [PDF]
, 2023 We prove Pfister's local-global principle for hermitian forms over Azumaya algebras with involution over semilocal rings, and show in particular that the Witt group of nonsingular hermitian forms is $2$-primary torsion.
Astier, Vincent, Unger, Thomas
core +1 more source
Extensions to Extended Tight‐Binding Methods for Transition‐Metal Containing Systems
Journal of Computational Chemistry, Volume 47, Issue 7, March 15, 2026.We present a new GFN2‐xTB implementation with a geometric direct minimization scheme and a Hubbard‐U correction. We demonstrate that the Hubbard correction improves linearity of the elctronic energy, stabilizes SCF convergence, and enables more accurate spin‐gap predictions in narrow application domains such as specific iron‐containing complexes ...
Siyavash Moradi +3 more
wiley +1 more source
A Generalized Primitive Element Theorem [PDF]
, 2007 We deal with the following variant of the primitive element theorem: any commutative strongly separable extension of a commutative ring can be embedded in another one having primitive element.
Bagio, Dirceu, Paques, Antonio
core +1 more source
Confined Chemistry in Space: Zeolite‐Supported Fe13 Nanoclusters Modulate CS Reactivity
Small Structures, Volume 7, Issue 3, March 2026.The study explores how an Fe13 cluster confined in chabazite reshapes the reaction of CS and H2 under astrochemical conditions. Confinement promotes C–S bond cleavage over hydrogenation, directing chemistry toward CH4 and H2S formation. Additional CS enables CS2 and C2 species. Microkinetic analysis identifies protoplanetary environments where zeolites
Gerard Pareras, Albert Rimola
wiley +1 more source
Direct-Sum Decompositions over Local Rings [PDF]
, 2001 Let (R,m) be a local ring (commutative and Noetherian). If R is complete (or, more generally, Henselian), one has the Krull–Schmidt uniqueness theorem for direct sums of indecomposable finitely generated R-modules. By passing to the m-adic completion R̂,
Wiegand, Roger
core +1 more source
SK1 of Azumaya algebras over Hensel pairs [PDF]
, 2010 Let A be an Azumaya algebra of constant rank n2 over a Hensel pair (R, I) where R is a semilocal ring with n invertible in R. Then the reduced Whitehead group SK1(A) coincides with its reduction SK1(A/I A).
Hazrat, Roozbeh (R16959)
core +2 more sources
Low Parsons–Zobel slope of metal–solution interfaces: A theoretical comparison of three causes
AIChE Journal, Volume 72, Issue 2, February 2026.Abstract Rational design of electrochemical energy conversion and storage devices hinges on a fundamental understanding of the electrical double layer (EDL) at the electrode–electrolyte interface. The classical Gouy–Chapman–Stern model of EDL predicts a unity Parsons–Zobel (PZ) slope, which is derived from the relation between inverse measured ...
Weiqiang Tang +3 more
wiley +1 more source
On sums of squares in local rings
, 2001 . Let A be a semilocal ring. We compare the set of positive semidefinite (psd) elements of A and the set of sums of squares in A. For psd f ∈ A, whether f is a sum of squares or not depends only on the behavior of f in an infinitesimal neighborhood of ...
Claus Scheiderer
core