
Re: triangular numbers and dets
Posted:
Apr 24, 2012 2:05 PM


> Seee! I went back to check you message and lost the > goddam text of this reply. Email mucho simpler > because I know what I am doing more or less with > YAHOO. My > email address is listed under my "jm bergot" to > make > life simpler at age sixtynine. I sometimes go to > sci.math and miss one of your messages. I wonder if > f you miss some of mine = I get zero replies to some > of my messages. Does zero=(1)Missed or (2)Tooo dumb > for a reply? > > I did poke around with your z=(3m^2 + n^2)/4. but it > is still trial and error with a calculator. I still > view this creature as being that triangle. Can > there > be MORE than one triangle having a shorter side > of 7, as in 7,33,37? > > Another approach is to look directly for > sqrt(4*z^23*y^2)is an integer. Still means trial > and error, suitable for a machine.
When I looked in your "profile" the email address was blank
On my profile, after my email address it says (hidden). So I assume one has to explicitly make the email unhidden...
Anyway, besides the triple 7^2 + 7*33 + 33^2 = 37^2 there is another with 7, namely 7^2 + 7*8 + 8^2 = 13^2.
I used my parametrization and maple's "isolve" to get these.
But maple's isolve doesn't guarantee to find all solutions, at least in quadratic cases.

