Re: differentiation operator

*To*: mathgroup at smc.vnet.net*Subject*: [mg100816] Re: differentiation operator*From*: Peter Breitfeld <phbrf at t-online.de>*Date*: Sun, 14 Jun 2009 21:21:03 -0400 (EDT)*References*: <004901c9e9e0$a4ba7900$ee2f6b00$@net> <22643639.1244693328354.JavaMail.root@n11> <h12gbj$e6c$1@smc.vnet.net>

"David Park" wrote: > Lim Cheung, > > > > When I bring up the Classroom Assistant palette, go to the Calculator > Advanced tab, and press the 2nd button in the 5th row it pastes the partial > differential form in my notebook. This has the partial symbol with var as a > subscript and another box to enter the expr. If I fill x into the var box, > and x^2 into the expr box, and then press Shift-Enter, the entire expression > will evaluate to obtain 2x. > > > > If you type x^2, select it, and then press the palette button, it will paste > the differential operator on the x^2. You will then still have to fill in > the x and use Shift-Enter. > > > > Does this not evaluate properly for you? If not, there is some bug in your > installation and you should contact WRI. > > > > True, this form does not look exactly like 'd/dx' but I would think it would > be good enough. > The interesting point here is: I you made your input-cell to be in TraditionalForm by changing its state with the cell menu or by setting TraditionalForm as default for input-cells in the preferences, then the following works: Paste d/d * from the Classroom-Assistant palette "Writing and Formatting" an fill in the x and in the numerator x^2 you get the desired result 2x. This even works, if you enter d x^2/d x using 2-dimensional input In Standard-Form both yields an error. But I agree with David, that using the template ESC dt ESC is good enough. -- _________________________________________________________________ Peter Breitfeld, Bad Saulgau, Germany -- http://www.pBreitfeld.de