[HoTT] Re: Weaker Freudenthal

[Ali Caglayan <alizter@gmail.com>]

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Here is an observation I had made:

We have that A is k-connected, we can show that susp A is (k+1)-connected 
and then show that loop susp A is k-connected. This gives us a k-connected 
map A -> 1 and a k-connected map loop susp A -> 1. This gives us a diagram 
which commutes with A and loop susp A in the top corners and 1 in the 
bottom. The LHS composition is homotopic to the RHS composition hence 
naming eta : A -> loop susp A, we have eta o unitmap being k-connected 
hence eta must also be k-connected. This isn't quite there.

Now I was hoping to use the fact that loop spaces are pullbacks hence there 
are maps coming out of 1s hence (k+1)-connectedness appears, but I couldn't 
get it to work.

On Sunday, 4 August 2019 12:59:09 UTC+3, Ali Caglayan wrote:
>
> Can we prove that the map A -> loop susp A is (k+1)-connected for a 
> k-connected A, without having to invoke Freudenthal?
>

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