Next Article in Journal
Connections of L-Quasi-Internal and L-Quasi-Enclosed Spaces with L-Grills, L-Filters and L-Neighborhood Spaces
Previous Article in Journal
A Lipschitz–Wasserstein Framework for Modeling Reaction-Time Distributions in Video Game Design
 
 
Search for Articles:
Title / Keyword
Author / Affiliation / Email
Journal
Article Type
 
 
Advanced Search
 
Section
Special Issue
Volume
Issue
Number
Page
 
Journals
Axioms
Volume 15
Issue 6
10.3390/axioms15060461
axioms-logo
Submit to this Journal Review for this Journal Propose a Special Issue
► Article Menu

Article Menu

share Share announcement Help format_quote Cite
first_page
settings
Order Article Reprints
Font Type:
Arial Georgia Verdana
Font Size:
Aa Aa Aa
Line Spacing:
Column Width:
Background:
This is an early access version, the complete PDF, HTML, and XML versions will be available soon.
Article

Certain Restrictions of Energy–Momentum Tensor in Bulk Viscous Fluid String Spacetimes

by
Sunil Kumar Yadav
1,
Uday Chand De
2 and
Mohammad Nazrul Islam Khan
3,*
1
Department of Applied Science and Humanities, United College of Engineering & Research, UPSIDC, Industrial Area, Naini, Prayagraj 211010, Uttar Predesh, India
2
Department of Pure Mathematics, University of Calcutta, 35 Ballygaunge Circular Road, Kolkata 700019, West Bengal, India
3
Department of Computer Engineering, College of Computer, Qassim University, Buraydah 51452, Saudi Arabia
*
Author to whom correspondence should be addressed.
Axioms 2026, 15(6), 461; https://doi.org/10.3390/axioms15060461 (registering DOI)
Submission received: 5 April 2026 / Revised: 13 June 2026 / Accepted: 17 June 2026 / Published: 19 June 2026
(This article belongs to the Section Mathematical Physics)
Versions Notes

Abstract

The aim of this paper is to characterize a relativistic bulk viscous fluid string spacetime whose energy–momentum tensor satisfying certain geometric symmetries. At first, it is shown that a relativistic bulk viscous fluid string spacetime is a generalized quasi-Einstein manifold. Then, we characterize such a spacetime, satisfying Codazzi type of energy–momentum tensor (denoted by T⊘), covariant constant T⊘, recurrent and generalized recurrent T⊘, and almost pseudo-symmetric and weakly symmetric T⊘, respectively. Next, we consider quadratic Killing T⊘ in such a spacetime. Finally, we provide a concrete example using partial differential equations.
Keywords: relativistic bulk viscous fluid string spacetime; energy–momentum tensor; T⊘-recurrent; differential equations; weakly T⊘-recurrent; generalized T⊘-recurrent and quadratic-Killing-type EMT relativistic bulk viscous fluid string spacetime; energy–momentum tensor; T⊘-recurrent; differential equations; weakly T⊘-recurrent; generalized T⊘-recurrent and quadratic-Killing-type EMT

Share and Cite

MDPI and ACS Style

Yadav, S.K.; De, U.C.; Khan, M.N.I. Certain Restrictions of Energy–Momentum Tensor in Bulk Viscous Fluid String Spacetimes. Axioms 2026, 15, 461. https://doi.org/10.3390/axioms15060461

AMA Style

Yadav SK, De UC, Khan MNI. Certain Restrictions of Energy–Momentum Tensor in Bulk Viscous Fluid String Spacetimes. Axioms. 2026; 15(6):461. https://doi.org/10.3390/axioms15060461

Chicago/Turabian Style

Yadav, Sunil Kumar, Uday Chand De, and Mohammad Nazrul Islam Khan. 2026. "Certain Restrictions of Energy–Momentum Tensor in Bulk Viscous Fluid String Spacetimes" Axioms 15, no. 6: 461. https://doi.org/10.3390/axioms15060461

APA Style

Yadav, S. K., De, U. C., & Khan, M. N. I. (2026). Certain Restrictions of Energy–Momentum Tensor in Bulk Viscous Fluid String Spacetimes. Axioms, 15(6), 461. https://doi.org/10.3390/axioms15060461

Note that from the first issue of 2016, this journal uses article numbers instead of page numbers. See further details here.

Article Metrics

Back to TopTop