I am an UGC Assistant Professor, appointed by the UGC under their Faculty Recharge Program.

Currently I am working on cosmology and relativity. I am mostly interested in DE and DM models of the universe and on inflationary cosmology. This apart I also work on higher dimensional gravity theory and on wormholes. I use models to understand the universe and its related physics using the given scientific and mathematical tools.

Alsthough my current area of research is in cosmology, I had an exposure on research in various fields of applied mathematics. During My Ph.D I was working with integral equations. I devised numerical techniques for their solutions, and those techniques are nowdays used quite often in related research. During my post-doctoral exposure at University of Utah, USA, I ventured into an altogether new field of Mathematical Biology. Here I used mathematical modelling to predict and understand biological systems. I worked on epidemiology and ecology, Taking various biological systems I tried to model them mathematically and from the ensuing mathematics I predicted their nature and relavance in the actual biological world. After joining Presidency University, I ventured into the field of cosmology and relativity.

This apart I am engaged in taking various undergraduate and post graduate classes here.

My first teaching experience dates back to 2005 when I worked as a Guest lecturer at Gokhale memorial college, Kolkata. There I was engaged in taking various undergraduate honours and pass courses. Later during my doctoral research I was engaged in teaching undergraduate engineering students at Jadavpur University. The various courses I taught at these places were differential calculus, differential equations, complex analysis, mechanics, computer programming and linear algebra. In 2012-2013 I was teaching at Narula Institute of Tachnology, Agarpara. There I was taking several undergraduate courses for engineering students under WBUT syllabus. Topics included differential and integral calculus, special functions, analysis and graph theory.

Here at Presidency University I am currently engaged in taking both undergraduate and post graduate mathematics classes. Courses include, Graph Theory, Rigid Dynamics, Numerical Analysis, Mathematical Methods, Differential equations, Advanced Numerical Analysis.

1. **Subhra Bhattacharya**; S. Halder; S. Chakraborty, (2019) *Formation of wormholes in modified gravity: Exotic matter and stability,* Mod. Phys. Lett. A, 33(1): 1950200.

2. S. Halder; **Subhra Bhattacharya**; S. Chakraborty, (2019) *Wormhole solutions in Rastall gravity theory,* Mod. Phys. Lett. A, 34(12): 1950095.

3. S. Halder; **Subhra Bhattacharya**; S. Chakraborty, (2019) *Spherically symmetric wormhole solutions in ageneral anisotropic matter field*, Phys. Lett. B, 791: 270–275.

4. S. Chakraborty; **Subhra Bhattacharya**, (2018) *Cosmic evolution with a general Gaussian** type scale factor*, * Int. J. Mod. Phys. D, 27: 1847019-035025.

*(*This essay received an Honorable Mention in the 2018 Essay Competition of the Gravity Research Foundation).*

5. **Subhra Bhattacharya**; S. Halder; S. Chakraborty, (2018) *Evolving Cosmic Scenario in Modified Chaplygin Gas with Adiabatic Matter Creation*, Annl. Phys., 388: 443-455.

6. **Subhra Bhattacharya**; S Chakraborty, (2017) *f(R) gravity solutions for evolving wormholes*, Eur. Phys. J. C, 77: 558-566.

7. G. S. Sharov; **Subhra Bhattacharya**, S. Pan, R. C. Nunes and S. Chakraborty, (2017) *A new interacting two-fluid model and its consequences, *Mon. Nocs. Roy. Astron. Soc., 466: 3497–3506 .

8. **Subhra Bhattacharya**; S Chakraborty, (2016) *A model of the emergent Universe in*

inhomogeneous spacetime, Class. Quantum Grav., 33: 035013-035019.

9. Supriya Pan; **Subhra Bhattacharya**; Subenoy Chakraborty, (2015) *An analytic model for interacting dark energy and its observational constraints, *Mon. Nocs. Roy. Astron. Soc., 452: 3038-3046.

10. **Subhra Bhattacharya** and F. Adler, (2012) *A time since recovery model with varying rates of loss of immunity*, Bull. Math. Biol. 74:2810--2819.

11. **Subhra Bhattacharya** and B. N. Mandal, (2010) *Numerical solution of an integral equation arising in the problem of a cruciform crack*, Int. J. Appl. Math. and Mech. 6:70-77.

12. **Subhra Bhattacharya** and B. N. Mandal, (2010) *Numerical solution of some classes of logarithmically singular integral equations*, J. Adv. Res. Appl. Math. 2:30-38.

13. **Subhra Bhattacharya** and B. N. Mandal, (2008) *Numerical solution of a singular integro-differential equation*, Appl. Math. Comput. 195:346-350.

14. **Subhra Bhattacharya** and B. N. Mandal, (2008) *Use of Bernstein polynomials in numerical solution of Volterra integral equations*, Appl. Math. Sci. 2:1773-1787.

15. **Subhra Bhattacharya** and B. N. Mandal, (2008) *Numerical solution of two special Fredholm integral equations of mathematical physics*, Int. J. Appl. Math. Engng. Sci. 2:117-121.

16. **Subhra Bhattacharya **and B. N. Mandal, (2007) Numerical solution of some classes of integral equations using Bernstein polynomials, Appl. Math. Comput. 190:1707-1716.