Department of Mathematics, University of Delhi (2019-24)

Thesis title: Exponential Starlikeness and Convexity of Hypergeometric and Certain Analytic Functions 

Publications:

• Naz, Adiba; Nagpal, Sumit; Ravichandran, V.  Exponential radii of starlikeness and convexity of some special functions. Ramanujan J. 65 (2024), no. 1, 391–427. MR4789402 

• Naz, Adiba; Nagpal, Sumit; Ravichandran, V. Geometric properties of generalized Bessel function associated with the exponential function. Math. Slovaca 73 (2023), no. 6, 1459–1478. MR4678552

• Naz, Adiba; Nagpal, Sumit; Ravichandran, V. Exponential starlikeness and convexity of confluent hypergeometric, Lommel, and Struve functions. Mediterr. J. Math. 17 (2020), no. 6, Paper No. 204, 22 pp. MR4172977 

Department of Mathematics, University of Delhi (2017-23)

Thesis title: Radius Problems and Construction Techniques for Univalent Harmonic Mappings

Publications:

• Raj, Ankur; Nagpal, Sumit. Radius Problems for the New Product of Planar Harmonic Mappings. Comput. Methods Funct. Theory. 25 (2025), no. 2, 453–472. MR4908854

• Raj, Ankur; Nagpal, Sumit. Stable close-to-convexity and radius of full convexity for sense-preserving harmonic mappings. Rocky Mountain J. Math.  54 (2024), no. 5, 525–540. MR4743451  

• Raj, Ankur; Nagpal, Sumit. Radius of convexity for analytic part of sense-preserving harmonic mappings. Bull. Malays. Math. Sci. Soc. 45 (2022), no. 5, 2665--2679. MR4489583 

• Raj, Ankur; Nagpal, Sumit; Ravichandran, V. On the product of planar harmonic mappings. Comput. Methods Funct. Theory 21 (2021), no. 3, 427--452. MR4299907 

Current Affiliation: Assistant Professor, Department of Mathematics, Kamala  Nehru College, University of Delhi

Department of Mathematics, University of Delhi (2016-2022)

Thesis title: Radius Constants and Differential Subordination for Certain Subclasses of Analytic Functions

Publications:

• Gandhi, Shweta; Gupta, Prachi; Nagpal, Sumit; Ravichandran, V. Starlike functions associated with an epicycloid. Hacet. J. Math. Stat. 51 (2022), no. 6, 1637--1660. MR4510346 

• Gupta, Prachi; Nagpal, Sumit; Ravichandran, Vaithiyanathan. Inclusion relations and radius problems for a subclass of starlike functions. J. Korean Math. Soc. 58 (2021), no. 5, 1147--1180. MR4303808 

• Gupta, Prachi; Nagpal, Sumit; Ravichandran, V. Marx-Strohhäcker theorem for multivalent functions. Afr. Mat. 32 (2021), no. 7-8, 1421--1434. MR4327479 

Department of Mathematics, University of Delhi (2017-18)

Dissertation title: Certain Special First and Second order Differential Subordinations

Publications:

• Naz, Adiba; Nagpal, Sumit; Ravichandran, V. Star-likeness associated with the exponential function. Turkish J. Math. 43 (2019), no. 3, 1353--1371. MR3962536