This is an announcement for the paper "Gauge functions for convex cones" by B. F. Svaiter. Abstract: We analyze a class of sublinear functionals which characterize the interior and the exterior of a convex cone in a normed linear space. Archive classification: math.FA math.OC Mathematics Subject Classification: 46B99, 46N10 Submitted from: benar@impa.br The paper may be downloaded from the archive by web browser from URL http://front.math.ucdavis.edu/1106.3342 or http://arXiv.org/abs/1106.3342