%0 Journal Article %T Operations in Milnor K-theory %A Charles Vial %J Mathematics %D 2008 %I arXiv %X We show that operations in Milnor K-theory mod $p$ of a field are spanned by divided power operations. After giving an explicit formula for divided power operations and extending them to some new cases, we determine for all fields $k$ and all prime numbers $p$, all the operations $K^M_i/p \to K^M_j/p$ commuting with field extensions over the base field $k$. Moreover, the integral case is discussed and we determine the operations $K^M_i/p \to K^M_j/p$ for smooth schemes over a field. %U http://arxiv.org/abs/0812.0481v1