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Macaulay2 web site
Depth : Table of Contents
Depth
-- computations involving regular sequences
depth(Ideal,Ring)
-- computes the depth of a ring
isCM
-- whether a ring or module is Cohen-Macaulay
isRegularSequence
-- whether a list is regular over a ring or module
regularSequence
-- generates a regular sequence
regularSequenceCheck
-- how much of a list is regular