Proof of Blakers-Massey Theorem #613
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mortberg
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Nov 11, 2021
mortberg
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Nov 11, 2021
| @@ -353,6 +354,18 @@ Square : | |||
| → Type _ | |||
| Square a₀₋ a₁₋ a₋₀ a₋₁ = PathP (λ i → a₋₀ i ≡ a₋₁ i) a₀₋ a₁₋ | |||
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| -- vertical composition of squares | |||
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@aljungstrom Didn't you need something like this in your very big PR?
ecavallo
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Nov 11, 2021
mortberg
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Nov 11, 2021
|
Oops: |
My bad. Forgot to use new name. |
ecavallo
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Nov 11, 2021
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This PR contains a cubical proof of the Blakers-Massey Theorem and adds some stuff to library that used in the proof.
It seems there is still no such proof of this fundamental result in homotopy theory, so I decided to spend some time to write one and tried to use as much explicit cubes as possible.