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# AffineChartGrass -- use an affine chart on the Grassmannian

- Usage:
    `AffineChartGrass => l`

## Description

This is an optional input for methods that involve computations on Grassmannians. The argument l can be a list of $k+1$ distinct integers between 0 and $n$, corresponding to an affine chart $U$ on the Grassmannian $\mathbb{G}(k,n)$. This indicates to the method that should perform internal computations using the chart $U$. Set this to false (resp. true) to not use any chart (resp. to use a random chart).

## See also

- chowForm -- Chow form of a projective variety
- fromPluckerToStiefel -- convert from Plücker coordinates to Stiefel coordinates
- hurwitzForm -- Hurwitz form of a projective variety
- isCoisotropic -- whether a hypersurface of a Grassmannian is a tangential Chow form
- tangentialChowForm -- higher Chow forms of a projective variety

## Functions with optional argument named AffineChartGrass:

- `chowForm(...,AffineChartGrass=>...)`
- `fromPluckerToStiefel(...,AffineChartGrass=>...)`
- `hurwitzForm(...,AffineChartGrass=>...)`
- `isCoisotropic(...,AffineChartGrass=>...)`
- `plucker(...,AffineChartGrass=>...)`
- `tangentialChowForm(...,AffineChartGrass=>...)`

## For the programmer

The object AffineChartGrass is a symbol.

The source of this document is in /build/macaulay2-88fgJW/macaulay2-1.25.11+ds/M2/Macaulay2/packages/Resultants.m2:1215:0.