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Results tagged with foundations
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user 39521
Mathematical logic, Set theory, Peano arithmetic, Model theory, Proof theory, Recursion theory, Computability theory, Univalent foundations, Reverse mathematics, Frege foundation of arithmetic, Goedel's incompleteness and Mathematics, Structural set theory, Category theory, Type theory.
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votes
What is an explicit bijection in combinatorics?
Here's an example (credit: Paul Russell) of the sort of bijection you want to rule out.
Question: Find an explicit bijection $f$ between the size-$k$ and size-$(k + 1)$ subsets of $\{1, 2, \dots, 2k+ …
- 12.4k