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Re: Matrix elimination
Posted:
Jan 30, 2013 4:25 AM


Thank you for your offer. But I don't need it so frequently and when in rare cases I need to show some solution steps to my students, I can use Wolfram Alpha, which serves perfectly for this purposes.
I was just interested, if there is some built in function for it in Mathematica. So it seems, that there isn't any.
Thanks
Jakub
> Original Message > From: djmpark [mailto:djmpark@comcast.net] > > The Presentations Application (which I sell from my web site for $50) has a > section called Student's Linear Equations. It is basically for didactic purposes or > solving small cases. It allows you to manipulate 2D matrix structures with > detailed operations such as individual operations on rows and columns, > individual column pivots, converting to echelon form with or without upper > triangular reduction. It also has display with row and column names to give > context. You can manipulate via successive displays in a notebook, or in a > Whiteboard window. > > It also allows contravariant and covariant columns. There is also provision for > displaying rows or columns as equation expressions, both as regular equations > and as chemical composition equations or as chemical reactions. > There is also provision for doing linear programming simplex operations. > > Presentations is a quite large Application aimed toward writing literate > notebooks with custom graphics, tables and dynamic presentations. > > David Park > djmpark@comcast.net > http://home.comcast.net/~djmpark/index.html >
> 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 >



