d = D ^L
Returns the p,q th map on an (upper index) spectral sequence page. The relationship $D^{p,q} = D_{-p,-q}$ holds.
Consider the filtered complex $K$ below, obtained by multiplying the minimal free resolution of the rational quartic space curve by successive powers of the irrelevant ideal.
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We compute a map on the third page of the spectral sequence associated to $K$.
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The source of this document is in /build/reproducible-path/macaulay2-1.25.05+ds/M2/Macaulay2/packages/SpectralSequences.m2:3440:0.