Non-abelian congruences between -values of elliptic curves
Let be a semistable elliptic curve over . We prove weak forms of Kato’s -congruences for the special values More precisely, we show that they are true modulo , rather than modulo . Whilst not quite enough to establish that there is a non-abelian -function living in , they do provide strong evidence towards the existence of such an analytic object. For example, if these verify the numerical congruences found by Tim and Vladimir Dokchitser.