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Questions about mathematics which don't fall into the other arXiv categories. If you have a general question about mathematics but it is not research level, it's off-topic but it might be welcomed on Mathematics Stack Exchange.

51 votes
9 answers
3k views

Examples of theorems where numerical bounds on $\pi$ played a role

This is a whimsical question, motivated purely by curiosity rather than for any application. We are all familiar with countless mathematical results which use Archimedes' constant $\pi$ either in thei …
Terry Tao's user avatar
  • 114k
26 votes
4 answers
3k views

What is the term for combining functions $f_1,f_2,\dots,f_n$ into a tuple $(f_1,\dots,f_n)$?

This is an embarrassingly simple question, but I was not able to find a definitive answer from literature search. Suppose one has some collection of functions $f_1: X \to Y_1, \dots, f_n: X \to Y_n$ …
Terry Tao's user avatar
  • 114k