Title : Linear and monomial polyhedra : Geometry and applications Abstract : We investigate size properties of a class of non-Euclidean balls defined by a large number of polynomial inequalities. In the real setting, this leads to $L^p$ bounds for the associated maximal operator. In the complex version of the problem, we use these balls to obtain sharp estimates for the Bergman kernel (on the diagonal) of a family of weakly pseudoconvex domains in $\mathbb C^n$. This is joint work with Alexander Nagel.