Wikipedia:Reference desk/Archives/Mathematics/2013 February 2

= February 2 =

Wulff net
What is the formula for calculating the y and x-intercepts for the latitudinal and meridonial curves for a Wulf net with radius 90? Plasmic Physics (talk) 05:46, 2 February 2013 (UTC)

Is my question chopped liver? Plasmic Physics (talk) 04:32, 5 February 2013 (UTC)

Definition and etiology of statistical/mathematical symbols
I teach Statistics and both frequent the statistical pages as well as send students to them for reference. More often than I would like, I encounter a symbol(s) with which I am unfamiliar, and/or have multiple meanings depending upon the equation or context. Is there a project to provide a simple definition and perhaps a brief history of statistical and mathematical symbols used in the equations and articles? Pw08096 (talk) 21:04, 2 February 2013 (UTC)pw08096


 * For definitions, see List of mathematical symbols. Duoduoduo (talk) 14:02, 3 February 2013 (UTC)

Thanks for the MATH list. That list is almost exclusively mathematical operators. As an example, the Greek symbol for sigma used in the list cited above is defined as a "selector". For a statistician, sigma is typically "standard deviation" and has an associated formula. This list would cause confusion for statisticians and others. Is there one for STATISTICAL terms and symbols? Pw08096 (talk) 22:46, 8 February 2013 (UTC)