MaplePrimes - answers and comments on Question, How do I generate a matrix given a formula involving the row & column indices?

Matrix constructor

John Fredsted — Sun, 21 Oct 2007 22:15:29 Z

You can use the Matrix constructor as follows:

M := Matrix(8,9,(i,j) -> diff(x^i+(x+1)^j,x));

The determinants, though, all seem to be zero:

with(LinearAlgebra):
seq(Determinant(DeleteColumn(M,i)),i=1..9);

Link to my preprint

resolvent — Tue, 23 Oct 2007 01:30:00 Z

To Robert Israel and John Fredsted and other interested parties: http://www.mapleprimes.com/files/5348_20070421%20ECCAD.pdf Of course, I need to edit out even MORE junk from it just when I thought I HAD something new (that Corollary 2.3 is nothing new nor applicable just to resolvents). Plus, I need to keep my paper as short as possible because I will submit it to the International Journal of Mathematics & Mathematical Sciences which charges authors by the page to publish. That's ok, though. I've become pretty emotionally inured to editing - from editing math papers to editing videos - having done a lifetime of it. I can be pretty "cruel/cool" and "objective" about my own work (and the work of others). (At least I like to think I am.) I've got a whole bunch more truly original ideas (math and applied math) stacked up for me to work on and perhaps someday publish.

Working link

John Fredsted — Tue, 23 Oct 2007 12:32:51 Z

I have taking the liberty to provide here a working link to your preprint.

Thank you!

resolvent — Tue, 23 Oct 2007 20:20:50 Z

Thank you, John Fredsted!

Have you read my emails?

John Fredsted — Tue, 23 Oct 2007 21:36:23 Z

You are quite welcome. I know this is a bit unconventional (that is using the forum in this way), but I would like to know if you have read my three private messages to you; I suppose not because they are all still marked "new" in my "Sent messages".

Oops! Sorry, I've not checked in recently!

resolvent — Wed, 31 Oct 2007 00:40:38 Z

Oops! Sorry, I've not checked in recently! I will look for your messages now. I am not aware of all the different directories on Mapleprimes. I tend just to go to the same ones, namely, the recent posts folder, over and over again. John