Take the 2-minute tour ×
MathOverflow is a question and answer site for professional mathematicians. It's 100% free, no registration required.

I need a reference/proof for "main conjecture of Iwasawa theory => refinement of Herbrand-Ribet ($v_p(B_{p-i}) = v_p(|A_i|)$, where $A_i$ denotes the $i$-th eigenspace of the Galois group acting on the ideal class group mod $p$)".

share|improve this question
Isn't that in the second edition of Washington, cyclotomic fields? –  Joël Oct 20 '12 at 16:29
add comment

1 Answer

up vote 3 down vote accepted

The statement and proof are given in Mazur–Wiles starting at page 216.

share|improve this answer
It can also be found in math.clemson.edu/~jimlb/CourseNotes/iwasawa.pdf p. 65ff. –  Timo Keller Oct 20 '12 at 18:16
add comment

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.