P. Choudhury

activity

20182026

most citedSign non-reversal property for totally non-negative and totally positive matrices, and testing total positivity of their interval hull

7 citations · 17 across the 21 of their papers we have counts for

collaborators

Showing 2025Show all

3 papers · 1 filter

math.FA2025

Entrywise preservers of sign regularity

Projesh Nath Choudhury, Shivangi Yadav

Entrywise functions preserving positivity and related notions have a rich history, beginning with the seminal works of Schur, Pólya-Szegő, Schoenberg, and Rudin. Following their cl…

math.CO2025

Quadratic Embedding Constants of Cartesian Products and Joins of Graphs

Projesh Nath Choudhury, Raju Nandi

The quadratic embedding constant (QEC) of a finite, simple, connected graph originated from the classical work of Schoenberg [Ann. of Math., 1935] and [Trans. Amer. Math. Soc., 193…

math.RA2025

Positivity of GCD tensors and their determinants

Projesh Nath Choudhury, Krushnachandra Panigrahy

Let $S = {s_{1}, s_{2}, \dots, s_{n}}$ be an ordered set of $n$ distinct positive integers. The $m$ th-order $n$ -dimensional tensor $T_{[S]} = (t_{i_{1} i_{2} \dots i_{m}}),$ where $t_{i…