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What IS a Number? As Explained by a Mathematician

A 43-minute video by Another Roof about number systems and proofs, on the Mathematics shelf. It came up in r/3Blue1Brown, in a thread called “Topic requests”.

Another Roof, Video, 43 min, 2022, on the Mathematics shelf

Builds number concepts from explicit mathematical definitions rather than assuming numbers are primitive objects.

Builds number concepts from explicit mathematical definitions rather than assuming numbers are primitive objects.