Betti numbers of 3-manifolds (Ex)
From Manifold Atlas
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| − | + | Let $G$ be the fundamental group of a closed orientable $3$-manifold. Show that $b_2(G) \leq b_1(G)$. | |
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[[Category:Exercises]] | [[Category:Exercises]] | ||
| − | [[Category:Exercises | + | [[Category:Exercises with solution]] |
Latest revision as of 07:07, 8 January 2019
Let 
be the fundamental group of a closed orientable 
-manifold. Show that 
.
