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arxiv: 0909.4567 · v1 · submitted 2009-09-24 · 🧮 math.GT

The Lusternik-Schniremann-category and the fundamental group

classification 🧮 math.GT
keywords biggfundamentalgroupcohomologicalcomplexdenotesdimensionevery
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We prove that $$ \cat X\le cd(\pi_1(X))+\bigg\lceil\frac{\dim X-1}{2}\bigg\rceil$$ for every CW complex $X$ where $cd(\pi_1(X))$ denotes the cohomological dimension of the fundamental group of $X$.

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