If you want to make a mathematician sweat, just ask them whether ((a, b), c) is ... | Hacker News

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alextgordon on Sept 29, 2015 | parent | context | favorite | on: Math Mistakes

If you want to make a mathematician sweat, just ask them whether ((a, b), c) is the same as (a, b, c).

Someone on Sept 29, 2015 | [–]

As I once said after someone, after a discussion on some trivial mathematical argument that he didn't grasp, said "OK, but one plus one equals two, right?": "it depends".

mjcohen on Sept 29, 2015 | | [–]

The answer is "What does '(a, b)' mean?"

asgard1024 on Sept 29, 2015 | [–]

Yes, up to isomorphism.

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