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project2linspace -- project a rational point onto affine subspace

Synopsis

Usage:

xp = project2linspace(A,b,x0)
Inputs:
- A, a matrix,
- b, a matrix, a vector
- x0, a matrix, a rational vector
Outputs:
- xp, a matrix, the projection of x0

Description

Projects a rational point $x_0$ onto the affine subspace given by $A x = b$

For the programmer

The object project2linspace is a function closure.