Sachin Kumar Srivastava
@cuhimachal.ac.in
Scopus Publications
- A fractional-order tumor–immune system model with combined vitamin and chemotherapy: analysis, stability, and control insights
V. Singh, N. Kumari, S. Sinha, S. K. Srivastava
International Journal of Dynamics and Control, 2026 - A nonlinear time-fractional-order epidemic model for tobacco smoking with sensitivity analysis
V. Singh, P. Thakur, S. K. Srivastava
Modeling Earth Systems and Environment, 2025 - Geometric inequalities of bi-warped product submanifold in generalized complex space form
Sachin Kumar Srivastava, Anuj Kumar
Journal of Geometry and Physics, 2024 - A Time-Fractional Order HIV/AIDS Epidemic Model with q-HATM
S. Thakur, V. Singh, A. Kumar, A. K. Singh, S. K. Srivastava
International Journal of Applied and Computational Mathematics, 2024 - Geometric characterization of pointwise slant curves
Results in Nonlinear Analysis, 2024 - Almost *-Ricci Soliton on α-paraSasakian Manifold
Kanika Sood, Khushbu Srivastava, Sachin Kumar Srivastava, Mohammad Nazrul Islam Khan
International Journal of Analysis and Applications, 2024
It has been noted that if the ∗-Ricci tensor used to define ∗-Ricci soliton is a constant multiple of the metric tensor g(ei,ej), for all ei, ej orthogonal to characteristic vector field ξ, then the manifold is ∗-Einstein manifold. The metric associated with ∗-Einstein manifold is ∗-Einstein metric, and the ∗-Ricci soliton is its generalization. In this paper we study an almost ∗-Ricci soliton (g, W, λ) and an almost gradient ∗-Ricci soliton (g, grad (ρ), λ) by means of mathematical operators on (2m+1)-dimensional α-paraSasakian manifold S2m+1. - Ricci Soliton of CR-Warped Product Manifolds and Their Classifications
Yanlin Li, Sachin Kumar Srivastava, Fatemah Mofarreh, Anuj Kumar, Akram Ali
Symmetry, 2023
In this article, we derived an equality for CR-warped product in a complex space form which forms the relationship between the gradient and Laplacian of the warping function and second fundamental form. We derived the necessary conditions of a CR-warped product submanifolds in Ka¨hler manifold to be an Einstein manifold in the impact of gradient Ricci soliton. Some classification of CR-warped product submanifolds in the Ka¨hler manifold by using the Euler–Lagrange equation, Dirichlet energy and Hamiltonian is given. We also derive some characterizations of Einstein warped product manifolds under the impact of Ricci Curvature and Divergence of Hessian tensor. - Characterization of bi-slant submanifolds of paraSasakian manifold
Filomat, 2023 - PR -Semi Slant Warped Product Submanifold of ParaKenmotsu Manifolds
M. Dhiman, A. Kumar, S. K. Srivastava
Results in Mathematics, 2022 - Characterizations of PR-Pseudo-Slant Warped Product Submanifold of Para-Kenmotsu Manifold with Slant Base
Sachin Kumar Srivastava, Fatemah Mofarreh, Anuj Kumar, Akram Ali
Symmetry, 2022
In this article, we study the properties of PR-pseudo-slant submanifold of para-Kenmotsu manifold and obtain the integrability conditions for the slant distribution and anti-invariant distribution of such submanifold. We derived the necessary and sufficient conditions for a PR-pseudo-slant submanifold of para-Kenmotsu manifold to be a PR-pseudo-slant warped product which are in terms of warping functions and shape operator. Some examples of PR-pseudo-slant warped products of para-Kenmotsu manifold are also illustrated in the article. - Characterization of Biharmonic Hypersurface
S.K. Srivastava, K. Sood, K. Srivastava
Researches in Mathematics, 2022 - Geometric inequalities of PR-warped product submanifold in para-Kenmotsu manifold
Fatemah Mofarreh, S. K. Srivastava, Anuj Kumar, Akram Ali
Aims Mathematics, 2022 - Inequalities for the Class of Warped Product Submanifold of Para-Cosymplectic Manifolds
Fatemah Mofarreh, Sachin Kumar Srivastava, Mayrika Dhiman, Wan Ainun Mior Othman, Akram Ali
Advances in Mathematical Physics, 2022 - A Note on Pointwise Semi-Slant Submanifold of Para-Cosymplectic Manifolds
Filomat, 2022 - Pointwise Slant Curves in Quasi-paraSasakian 3-Manifolds
K. Sood, K. Srivastava, S. K. Srivastava
Mediterranean Journal of Mathematics, 2020 - Nonexistence of PR -semi-slant warped product submanifolds in paracosymplectic manifolds
A. Sharma, Siraj Uddin, S. K. Srivastava
Arabian Journal of Mathematics, 2020 - Non-existence of pr-pseudo-slant warped product submanifolds of paracosymplectic manifoldss
Anil Sharma, Sachin Kumar Srivastava, and
Mathematica, 2019 - PR-pseudo-slant warped product submanifold of a nearly paracosymplectic manifold
Analele Stiintifice Ale Universitatii Al I Cuza Din Iasi Matematica, 2019 - Geometry of PR -semi-invariant warped product submanifolds in paracosymplectic manifold
S. K. Srivastava, A. Sharma
Journal of Geometry, 2017 - Pointwise Pseudo-slant Warped Product Submanifolds in a Kähler Manifold
S. K. Srivastava, A. Sharma
Mediterranean Journal of Mathematics, 2017 - Harmonic maps and para-Sasakian geometry
Matematicki Vesnik, 2017 - A general optimal inequality for warped product submanifolds in paracosymplectic manifolds
S. K. Srivastava, A. Sharma
Note Di Matematica, 2017 - On a Class of α-Para Kenmotsu Manifolds
K. Srivastava, S. K. Srivastava
Mediterranean Journal of Mathematics, 2016
