User Doug Spoonwood - Skeptics Stack Exchange

Doug Spoonwood

Member for 9 years, 1 month
Last seen more than 1 year ago

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Aug 18, 2017

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35

Set theory: difference between belong/contained and includes/subset?

20

Big Bang Theory Reference to Formal Logic

15

How many subsets of $\mathbb{N}$ have the same cardinality as $\mathbb{N}$?

15

Where did mathematicians learn how to do truth tables?

14

Is the Ratio of Associative Binary Operations to All Binary Operations on a Set of $n$ Elements Generally Small?