Publications

1. (With Projesh Nath Choudhury.) Entrywise preservers of sign regularity
   Transactions of the American Mathematical Society, in press. [arXiv]
2. (With Projesh Nath Choudhury.) Linear preserver problems in matrix positivity theory
   Acta Scientiarum Mathematicarum, published online. [arXiv]
3. (With Projesh Nath Choudhury.) Sign regularity preserving linear operators
   Bulletin of the London Mathematical Society 58, Article #e70209 (24 pp.), 2026. [arXiv]
4. (With Projesh Nath Choudhury.) Sign regular matrices and variation diminution: Single-vector tests and characterizations, following Schoenberg, Gantmacher–Krein, and Motzkin
   Proceedings of the American Mathematical Society 153, pages 497–511, 2025. [arXiv]
5. (With Projesh Nath Choudhury.) Constructing strictly sign regular matrices of all sizes and sign patterns
   Bulletin of the London Mathematical Society 57, pages 2077–2096, 2025. [arXiv]