Results 81 to 90 of about 63,399 (238)

Gradient Ricci Bourguignon solitons on perfect fluid space-times [PDF]

open access: yesJournal of Mahani Mathematical Research
The main purpose of the present paper is about characterizing the properties of the perfect fluid space-time that admits the gradient Ricci-Bourguignon soliton. This gives some results about the stability of the energy-momentum tensor and also under some
Sakineh Hajiaghasi, Shahroud Azami
doaj   +1 more source

Greening the Narrative: How Organizational Culture Impacts Environmental Disclosures

open access: yesBusiness Strategy and the Environment, Volume 35, Issue 1, Page 893-925, January 2026.
ABSTRACT In light of existential dangers to our planet, the urgency to reevaluate corporate practices has never been more palpable. With an emphasis on disclosures, this groundbreaking research sets out to analyze the complex relationship between corporate culture and its significant influence on environmental sustainability within firms.
Gurmani Chadha   +2 more
wiley   +1 more source

The Long-Time Behavior of the Ricci Tensor under the Ricci Flow [PDF]

open access: yesGeometry, 2013
We show that, given an immortal solution to the Ricci flow on a closed manifold with uniformly bounded curvature and diameter, the Ricci tensor goes to zero as . We also show that if there exists an immortal solution on a closed 3-dimensional manifold such that the product of the curvature and the square of the diameter is uniformly bounded, then this ...
openaire   +2 more sources

A structural view of corporate purposes

open access: yes
European Management Review, EarlyView.
Margaret Blair   +3 more
wiley   +1 more source

100 years of GAMM: Motivation, history and achievements

open access: yesZAMM - Journal of Applied Mathematics and Mechanics / Zeitschrift für Angewandte Mathematik und Mechanik, Volume 106, Issue 1, January 2026.
Abstract The International Association of Applied Mathematics and Mechanics (Gesellschaft für Angewandte Mathematik und Mechanik, GAMM) was founded in 1923 with the goal to strengthen the field of scientific engineering by the foundation of an Engineering Association with strong scientific contacts to Applied Mathematics.
Wolfgang Ehlers
wiley   +1 more source

Curvature tensor under the Ricci flow [PDF]

open access: yesAmerican Journal of Mathematics, 2005
Consider the unnormalized Ricci flow ( g ij ) t = -2 R ij for t ∈ [0, T ), where T < ∞. Richard Hamilton showed that if the curvature operator is uniformly bounded under the flow for all times t ∈ [0, T ), then the solution can be extended beyond T . We prove that if the Ricci curvature is uniformly bounded under the flow for all times t ∈ [0, T ),
openaire   +2 more sources

Varieties of Racial Capitalism: Black and Muslim Italians' Unequal Migrations Between Italy and Post‐Brexit Britain

open access: yesAntipode, Volume 58, Issue 1, January 2026.
ABSTRACT This article advances debates on racial capitalism by reconceptualising it as globally connected yet regionally uneven, and as negotiated and resisted through unequal migrations. Drawing on interviews with Black and Muslim Italians living in Britain or returned to Italy, it explores how participants and their families use EU mobility rights to
Simone Varriale
wiley   +1 more source

Axially Symmetric-dS Solution in Teleparallel f(T) Gravity Theories

open access: yesAdvances in High Energy Physics, 2015
We apply a tetrad field with six unknown functions to Einstein field equations. Exact vacuum solution, which represents axially symmetric-dS spacetime, is derived.
Gamal G. L. Nashed
doaj   +1 more source

Beyond the Hodge theorem: Curl and asymmetric pseudodifferential projections

open access: yesJournal of the London Mathematical Society, Volume 113, Issue 1, January 2026.
Abstract We develop a new approach to the study of spectral asymmetry. Working with the operator curl:=∗d$\operatorname{curl}:={*}\mathrm{d}$ on a connected oriented closed Riemannian 3‐manifold, we construct, by means of microlocal analysis, the asymmetry operator — a scalar pseudodifferential operator of order −3$-3$.
Matteo Capoferri, Dmitri Vassiliev
wiley   +1 more source

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