ceiling( E1 )
floor( E1 )
Start with a rational or real Weil divisor. We form a new divisor whose coefficients are obtained by applying the ceiling or floor function to them.
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The source of this document is in /build/reproducible-path/macaulay2-1.25.05+ds/M2/Macaulay2/packages/Divisor.m2:2555:0.