Talk:Derivate (disambiguation)

(Differentiate)
Derivate does not mean to take the derivative of a function. At least not in the English language. The verb is "differentiate". 68.183.205.212 17:12, 21 November 2006 (UTC)


 * Yeah, I was thinking the same thing. I'll remove it. --Galaxiaad 07:09, 25 February 2007 (UTC)
 * Good calls, both, even tho Webster's Second International gives "derivate" (as a noun) as having two mathematical senses (my rewording):
 * derivative
 * for a non-differentiable function, any of the (up to four) limits (upper and lower, and for decreasing and increasing deltas) of the familiar expression that gives the differential of a function, and the difference quotient (which has of course (for a differentiable function) has, as its (sole) limit as delta goes to zero, the derivative of that function. (It also provides a notation -- which would start out by misleading most math majors! -- for each of these four derivates.)
 * --Jerzy•t 17:02 & :15, 4 August 2010 (UTC)

Re the variations on differentiability
I haven't the patience, at least until the Dab's current problems are fixed, to sort out whether our chaotic coverage of semi-differentiability (at Semi-differentiability) and one-sided differentiability (at Semi-differentiability) is simply a refactoring and addition of a sentence away from covering the sense of derivate that i mention in the preceding secn. It's certainly not the most important sense for inclusion in the accompanying Dab, but i think it will be desirable if we're already close to properly covering that sense. --Jerzy•t 20:52, 4 August 2010 (UTC)