Can we compute denominators of Eisenstein classes?

G. Harder

We discuss the general conjecture that the denominators of Eisenstein classes should be related to the prime factorisation of certain special values of L-functions. We propose an experimental procedure to verify (or falsify) this conjecture in a given special case. We also discuss an interesting special case, where this experimental approach could be tested. 

Advanced Studies: Euro-Tbilisi Mathematical Journal, Special Issue (9 - 2021), pp. 131-165