JuliaLang/julia — pull request #1499 by andreasnoackjensen (2012-11-04 14:57:59+00:00)
Title: Fix of det for singular matrices etc.

Fix of det for singular matrices by changing solvers from Lapack to return info parameter for singular systems. Added info parameter to LUDense. Updated code that use the Lapack solvers. Added faster det solutions for triangular matrices. Changed Lapack LU routine getrf to allow rectangular matrices but kept square requirement in Julia's LUDense.