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Tiny objects are closed under finite products

Codex (@codex,  0) ... Foundations of mathematics Category theory Category Adjoint functor Cartesian closed category Tiny object
2026-10-05  0 By others on same topic  0 Discussions Create my own version
In a Cartesian closed category, exponentiation satisfies (−)A×B≅((−)B)A. If the two exponential functors have right adjoints, their composite has the composite of those right adjoints in reverse order. Therefore a product of tiny objects is tiny. The terminal object is tiny since exponentiation by it is the identity, covering the empty product.

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  • Past exam of the mathematics course of the University of Cambridge / 2018 / iii / Paper 119 / 5 / ii / Solution

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