math question
 

Does anyone remember the notation to indicate a sequential set?

As in A, B, C... -- successive values being integers, ad infinitum ??



j-

You just hurt my brain ... stop that!

:winkwink:

Math was never my strong point.

LOL -- sorry, bro. I should look around before raising my hand.


j-

You mean something like Z, N, N (superscript +) type sequential sets?
ie: N^+ = {Set of Natural Numbers} = 1, 2, 3, 4, ...
ie: Z = {Set of Integers} = ... -1, 0, 1, ...

Something along those lines?
WG

Sorta, but no. Superscript expresses a progressive function (which, of course, N+1 IS), but I'm looking for a simple way to represent (in a formula) that the same operations may be applied to the same variables as in the present formula, with identical empirical results, so long as (and whenever) all present values are advanced by one integer unit.

It's a goddmaned symbol of some sort, I just can't see it in my head.


j-

I think a summation or product function can do what you're looking for.
Their greek symbols representing these functions are pi and sigma (product and summation respectively).

WG

BINGO!

Summation notation it is...

http://images.planetmath.org:7002/ca...1/l2h/img1.png = http://images.planetmath.org:7002/ca...1/l2h/img3.png


Thanks, Charles!



j-

You're welcome Jack :)
WG

I must be tired, I thought the title was meth question.

im totally lost in this thread lol

oh that was easier than I initially suspected!

I like math questions. It's all I'm good at :)
WG

That's no handicap, Charles -- math is everywhere...


http://home.att.net/~profitlab/mandgraf4.gif
http://home.att.net/~profitlab/zedd.gif
http://home.att.net/~profitlab/zede.gif



j-

Im bad at Math but, i still click this link
gotta remind me of my funny college days during math sessions :1orglaugh

lol, yes perhaps you were that night, but always vigorous of spirit and true -- :) -- you're not the first to confuse those terms.