Why is ? Shouldn't it be ?

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- September 29th 2011, 10:03 PMJskidempty set and intersection
Why is ? Shouldn't it be ?

- September 30th 2011, 01:23 AMemakarovRe: empty set and intersection
- September 30th 2011, 07:58 AMMoeBleeRe: empty set and intersection
- October 3rd 2011, 06:34 PMJskidRe: empty set and intersection
First page of section 2.2 in Discrete Mathematics for Logic and Foundations.

- October 3rd 2011, 09:25 PMissacnewtonRe: empty set and intersection
are you sure about the name of the book. amazon doesn't come up with any book with that name

- October 4th 2011, 09:54 AMMoeBleeRe: empty set and intersection