Re: differentiation operator

*To*: mathgroup at smc.vnet.net*Subject*: [mg100690] Re: [mg100645] differentiation operator*From*: Chee Lim Cheung <CheeLC at sp.edu.sg>*Date*: Thu, 11 Jun 2009 07:08:12 -0400 (EDT)

Hi David Park Thank you for your reply. I tried the d/dx operator (like what we see in Calculus textbooks) in the Classroom Assistant palette but it seems to be for display only. (Am i missing something here?) I guess the solution is to format it to behave like a differentiation operator. Any ideas on that? We would like d(f[x])/dx to function in the same way as D[f[x],x]. Thank you all for your suggestions. Regards Mr. Chee "David Park" <djmpark at comcast.net> I don't see why you say that the differential operator on the palette doesn't work. If you paste it in a notebook and then fill in x and the expression and then evaluate, it will work. Otherwise, you could do something like: d[x_] = Function[expr, D[expr, x]]; d[x][x^2] 2 x David Park djmpark at comcast.net http://home.comcast.net/~djmpark/ From: Chee Lim Cheung [mailto:CheeLC at sp.edu.sg] Hi All My students have asked me whether it is possible to define the operator= df[x]/dx for differentiation rather than D[f[x],x]. The operator is available in a palette but it does not seem to do anything other than f= or display only. Example: d/dx(x^2)=2x rather than D[x^2,x]=2x. Am I missing something? Thanks Mr. Chee