Abstract
AbstractWe present a combinatorial proof for the existence of the sign-refined grid homology in lens spaces and a self-contained proof that
$\partial _{\mathbb{Z}}^2 = 0$
. We also present a Sage programme that computes
$\widehat{\mathrm{GH}} (L(p,q),K;\mathbb{Z})$
and provide empirical evidence supporting the absence of torsion in these groups.
Publisher
Cambridge University Press (CUP)
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