Dieudonné's theorem

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In mathematics, Dieudonné's theorem, named after Jean Dieudonné, is a theorem on when the Minkowski sum of closed sets is closed.

Statement of theorem[edit]

Let nonempty closed convex sets a locally convex space, if either or is locally compact and (where gives the recession cone) is a linear subspace, then is closed.[1][2]


  1. ^ J. Dieudonné (1966). "Sur la séparation des ensembles convexes". Math. Ann.. 163. 
  2. ^ Zălinescu, Constantin (2002). Convex analysis in general vector spaces. River Edge, NJ: World Scientific Publishing Co., Inc. pp. 6–7. ISBN 981-238-067-1. MR 1921556.