General matrices: least squares

Topics
	gels: Least squares solves Ax = b using QR factorization (driver)
	gglse: Least squares solves Ax = b subject to Bx = d (driver)
	geqrsv: Solves Ax = b using QR factorization (driver)

Detailed Description

Solves \(Ax \approx b\) where \(A\) is rectangular

See also

Orthogonal/unitary factorizations