internal language

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internal language

logic

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foundations of mathematics
Internal language
It turns out that each topos 𝒯 has an internal language L(𝒯), an intuitionistic type theory whose types are objects and whose terms are arrows of 𝒯. Conversely, every type theory ℒ generates a topos T(ℒ), by the device of turning (equivalence classes…
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It turns out that each topos 𝒯 has an internal language L(𝒯), an intuitionistic type theory whose types are objects and whose terms are arrows of 𝒯. Conversely, every type theory ℒ generates a topos T(ℒ), by the device of turning (equivalence classes…
Read More