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Aug 23, 2012 at 0:29 vote accept kate_r
Aug 22, 2012 at 23:18 comment added Kaveh A related question on MSE: math.stackexchange.com/questions/23799/…
Aug 22, 2012 at 18:12 answer added Carl Mummert timeline score: 22
Aug 22, 2012 at 16:20 history edited Andrej Bauer CC BY-SA 3.0
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Aug 22, 2012 at 16:15 comment added Andrej Bauer Please don't close the question. The question is a symptom of logicians' always preferring single-sorted theories over multi-sorted ones. So everyone ends up thinking that functions must necessarily involve second-order logic, which is false.
Aug 22, 2012 at 16:13 answer added Andrej Bauer timeline score: 14
Aug 22, 2012 at 15:27 comment added Carl Mummert There is no important syntactic difference between second-order and first-order logic. Any syntax that works in second-order logic would work equally well in a suitable first-order logic. However, I agree this question is better suited for math.stackexchange.org. If you can ask it there, I will write a longer answer.
Aug 22, 2012 at 14:55 history edited kate_r CC BY-SA 3.0
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Aug 22, 2012 at 14:01 comment added Emil Jeřábek No .
Aug 22, 2012 at 13:40 history asked kate_r CC BY-SA 3.0