Abstract
Let GS be the Galois group of the maximal pro-p-extension QS of Q unramified outside a finite set S of places of Q not containing the prime p > 2. In this work, we develop a method to produce some examples of mild (and thus FAB) pro-p-groups GS for which some relations are of degree three (according to the Zassenhaus filtration). The key computation are done in some Heisenberg extensions of Q of degree p3. With the help of GP-Pari we produce some examples for p = 3.
