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For questions on the formal system in mathematical logic for expressing effective functions, programs and computation, and proofs, using abstract notions of functions and combining them through binding and substitution.

12 votes
3 answers
7k views

Is functional programming a branch of mathematics?

In Theory mainly concerned with lambda-calculus?, F. G. Dorais wrote, of the idea that the lambda-calulus defines a domain of mathematics: That would never stick unless there's another good reason …
10 votes
2 answers
2k views

Scott on the consistency of the lambda calculus

I have twice heard it attributed to Dana Scott that he said something to the effect that the consistency of the lambda-calculus was an accident. Does anyone have a reasonable-sounding source for this …
Charles Stewart's user avatar
0 votes

Can dependent sums be encoded as dependent products?

This is certainly not what the question was after, but since the answers seem to be something along the lines of yes, sometimes, but not unless... Multi-sorted first-order logic (i.e., classical logi …
Charles Stewart's user avatar
6 votes

Theory mainly concerned with $\lambda$-calculus?

I don't know of one that seems sufficiently general. The theory's at an intersection: It (in its untyped guise) is one of the four most important Turing-complete computation systems; It is algebra …
Charles Stewart's user avatar