Radon measure




If XX is a locally compact Hausdorff topological space, a Radon measure on XX is a Borel measure on XX that is

  • finite on all compact subsets,

  • outer regular (i.e. can be approximated from outside by measure on the open sets) on all Borel sets, and

  • inner regular (i.e. can be approximated from inside by a measure on compact sets) on open sets.


If a Radon measure is σ\sigma-finite then it is regular (i.e. both inner and outer regular) on all Borel subsets. Left (right) Haar measure on a locally compact topological group is a nonzero Radon measure which is invariant under left (right) multiplications by elements in the group.

  • Gerald B. Folland, A course in abstract harmonic analysis, Studies in Adv. Math. CRC Press 1995

Last revised on April 18, 2012 at 16:38:41. See the history of this page for a list of all contributions to it.