If t != true then return only the map from the non-free part of the MCM approximation Otherwise, return the pair of maps that defines the MCM approximation. Default is t ==true.
See also
approximation -- returns pair of components of the map from the MCM approximation
auslanderInvariant -- measures failure of surjectivity of the essential MCM approximation
CoDepth -- Option for syzygyModule(-k,M,CoDepth => m)
Functions with optional argument named Total :
approximation(...,Total=>...) -- see approximation -- returns pair of components of the map from the MCM approximation
coApproximation(...,Total=>...) -- see coApproximation -- Maximal Cohen-Macaulay co-approximation of M