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# Total -- option for approximation

- Usage:
    `approximation(M, Total =>t)`
- Inputs:
  - M, a module,
  - t, a Boolean value,

## Description

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

## For the programmer

The object Total is a symbol.

The source of this document is in /build/macaulay2-88fgJW/macaulay2-1.25.11+ds/M2/Macaulay2/packages/MCMApproximations.m2:491:0.