H = cohomCalg X
The keys of this hash table are the divisor classes (degrees) whose cohomology vector has already been computed. The value of the hash table for this key is a list of two things: the cohomology vector, and a list representing the denominators which appear for this degree.
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Notice that the hash table H is empty, as we haven't tried computing any cohomology vectors yet.
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The source of this document is in /build/reproducible-path/macaulay2-1.25.06+ds/M2/Macaulay2/packages/CohomCalg.m2:282:0.