Người báo cáo:
Jugal Verma
(Indian Institute of Technology, Mumbai)
Time: 9:00 -- 10:15, December 18, 2024
Venue: Room 612, A6, Institute of Mathematics-VAST
Abstract: Let be a -dimensional local ring, be an -primary ideal and let have prime characteristic
K.-I. Watanabe and K.-I. Yoshida investigated the Hilbert-Kunz multiplicity of powers of in terms of Hilbert coefficients of I and its Frobenius powers where It was proved by V. Trivedi that if is zero-dimensional graded ideal of a standard graded ring of dimension over a field, then exists. Illya Smirnov proved Trivedi's result for -primary ideals of all local rings. Smirnov asked if exists for and whether the HK multiplicity of for all large is given by the formula [e_{HK}(I^n)=sum_{k=0}^d (-1)^k L_k(I)binom{n+d-k-1}{d-k}.] Smirnov also conjectured that ideals of reduction number one can be characterised in terms of the HK multiplicity. I will report on joint works with {bf Kriti Goel, Arindam Banerjee and Shreedevi Masuti, Marilina Rossi and Alessandro De Stefani, } which provide partial answers to Smirnov's questions.