Introduzione
Abstract
En
Given a countably paracompact normal space
with a closed subspace
and a finite derected graph
with a subgraph
, there are bijections from the sets of homotopy classes
and
to the sets of o*-homotopy classes
and
respectively (see 3).Here we prove,by some examples,that certain conditions on
weaker than the ones required in (3) are not sufficent to prove the results given above.
Given a countably paracompact normal space
![S](http://siba-ese.unisalento.it/plugins/generic/latexRender/cache/5dbc98dcc983a70728bd082d1a47546e.png)
![S^1](http://siba-ese.unisalento.it/plugins/generic/latexRender/cache/679c4c927f816045befe573024ddd21b.png)
![G](http://siba-ese.unisalento.it/plugins/generic/latexRender/cache/dfcf28d0734569a6a693bc8194de62bf.png)
![SG^1](http://siba-ese.unisalento.it/plugins/generic/latexRender/cache/1281d4b476fa5c5b300903afd1ed60d5.png)
![Q(S,G)](http://siba-ese.unisalento.it/plugins/generic/latexRender/cache/e5241ad44512bc99f854f8da91d462f3.png)
![Q(S,S^1;G,G^1)](http://siba-ese.unisalento.it/plugins/generic/latexRender/cache/d0bf881c56dcee2eada256843df18350.png)
![Q^\ast(S,G)](http://siba-ese.unisalento.it/plugins/generic/latexRender/cache/f13ffe47be0d0f9afdee466e398aab58.png)
![Q^\ast(S,S^1;G,G^1)](http://siba-ese.unisalento.it/plugins/generic/latexRender/cache/05473939f881021957fc610d919421e4.png)
![S](http://siba-ese.unisalento.it/plugins/generic/latexRender/cache/5dbc98dcc983a70728bd082d1a47546e.png)
DOI Code:
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