Re: Matrix elimination

*To*: mathgroup at smc.vnet.net*Subject*: [mg129609] Re: Matrix elimination*From*: danl at wolfram.com*Date*: Tue, 29 Jan 2013 02:43:38 -0500 (EST)*Delivered-to*: l-mathgroup@mail-archive0.wolfram.com*Delivered-to*: l-mathgroup@wolfram.com*Delivered-to*: mathgroup-newout@smc.vnet.net*Delivered-to*: mathgroup-newsend@smc.vnet.net*References*: <ke593a$s80$1@smc.vnet.net>

On Monday, January 28, 2013 1:24:26 AM UTC-6, =C5 er=C3=BDch Jakub wrote: > Dear comunity, > > I'm trying to play around with the simple matrixes in Mathematica for the first time and I have beginners question: > > > > Does Mathematica have a function, which makes the intermediate step of Gaussian elimination to produce just eliminated upper triangular matrix? Function UpperTriangular only cuts the lower triangular places off (which is not what I need) and RowReduce makes the completely reduced echelon form of matrix. > > I needed the step in the middle of the RowReduce way. > > > > Thanks in advance for any tips > > > > Jakub LUDecomposition will give, among other things, the upper triangular part. Note that it does pivoting so any usage of the result would need to take that into account.