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On the σ-class generated by open balls

Published online by Cambridge University Press:  01 July 1999

STEVE JACKSON
Affiliation:
Department of Mathematics, University of North Texas, Denton, TX 76203-5116 e-mail: jackson@unt.edu, e-mail: mauldin@dynamics.math.unt.edu
R. DANIEL MAULDIN
Affiliation:
Department of Mathematics, University of North Texas, Denton, TX 76203-5116 e-mail: jackson@unt.edu, e-mail: mauldin@dynamics.math.unt.edu

Abstract

We show that in the finite dimensional space ℝd provided with a metric induced by a norm, the collection of Borel sets is the smallest collection containing the open balls and closed under complements and countable disjoint unions.

Type
Research Article
Copyright
The Cambridge Philosophical Society 1999

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