GAP 4.8.9 installation with standard packages -- copy to your CoCalc project to get it

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<Verb>CriticalCells(K):: RegCWComplex --> List</Verb><P/>
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<P/> Inputs a regular CW-complex <M>K</M> 
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and returns its critical cells with respect to some discrete vector field on 
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<M>K</M>. If  no discrete vector field on <M>K</M> is available then one will be computed and stored.
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