1. Any union of any collection of open sets is open. The intersection of a finite collection...

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1. Any union of any collection of open sets is open. The intersection of a finite collection of open sets is open.
2. The union of a finite collection of closed sets is closed. The intersection of any collection of closed sets is closed.

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Foundations of Mathematical Economics

ISBN: 978-0262531924

1st edition

Authors: Michael Carter

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Question Posted: May 02, 2016 11:33 AM

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1. Any union of any collection of open sets is open. The intersection of a finite collection...

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1 Let be a possibly infinite collection of open sets Let Let be a point in Then there exists some pa...View the full answer

Foundations of Mathematical Economics

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