Testwiki:Reference desk/Archives/Mathematics/2012 March 29

{| width = "100%"

|- ! colspan="3" align="center" | Mathematics desk |- ! width="20%" align="left" | < March 28 ! width="25%" align="center"|<< Feb | March | Apr >> ! width="20%" align="right" |Current desk > |}

Welcome to the Wikipedia Mathematics Reference Desk Archives
The page you are currently viewing is a transcluded archive page. While you can leave answers for any questions shown below, please ask new questions on one of the current reference desk pages.

March 29

math onto graphmatica

How to insert an equation like y=2-3 with the exponent 2 above 2, and y=5 to the power of x+3 and y=2 to the power of 2x-1 onto the program Graphmatica? — Preceding unsigned comment added by 70.31.20.138 (talk) 19:50, 29 March 2012 (UTC)

I haven't used graphmatica, but the usual way is to add parentheses, like this: y=5^(x+3). That works on Wolfram alpha, for instance. 130.76.64.118 (talk) 21:40, 29 March 2012 (UTC)

A notation for Hadamard product

I was curious if anyone knew of a common notation for the Hadamard product akin to capitol sigma notation for summation. That is, I need to denote the Hadamard product of $P_i$ over all i. Anyone seen something like this? Is there a common convention? Thanks, --TeaDrinker (talk) 19:54, 29 March 2012 (UTC)

$Q_{jk}={\mathrm{\Pi }}_i{P}_{ijk}$. Bo Jacoby (talk) 20:34, 29 March 2012 (UTC).

Ah sure, just describe the product pointwise; that would certainly work. Thanks, --TeaDrinker (talk) 21:32, 29 March 2012 (UTC)