Thursday, May 18, 2017
4:00 pm
Sloan 257

Number Theory Seminar

On the Gross-Stark Conjecture
Samit Dasgupta, Department of Mathematics, University of California, Santa Cruz

In 1980, Gross conjectured a formula for the expected leading term at $s=0$ of the Deligne-Ribet $p$-adic $L$-function associated to a totally even character $\psi$ of a totally real field $F$. The conjecture states that after scaling by $L(\psi \omega^{-1}, 0)$, this value is equal to a $p$-adic regulator of units in the abelian extension of $F$ cut out by $\psi\omega^{-1}$. In this talk we describe a proof of Gross's conjecture. This is joint work with Mahesh Kakde and Kevin Ventullo.

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