RE: Mixed derivative button on basic input palette
- To: mathgroup at smc.vnet.net
- Subject: [mg40687] RE: [mg40659] Mixed derivative button on basic input palette
- From: "David Park" <djmp at earthlink.net>
- Date: Sun, 13 Apr 2003 02:19:33 -0400 (EDT)
- Sender: owner-wri-mathgroup at wolfram.com
Will, You have to put parentheses around x^3 y^4, otherwise you are calculating D[x^3, x, y]y^4 David Park djmp at earthlink.net http://home.earthlink.net/~djmp/ From: Will Self [mailto:wself at msubillings.edu] To: mathgroup at smc.vnet.net Would you try the mixed derivative button on your basic input palette and see if it works? Click on the button and put x and y in the two subscripts, then put x^3y^4 in the box to the right. I get 0, both in versions 4.0 and 4.2. It seems that the Wolfram people could have fixed this bug by now. Of course, the kernel is fine, and D[x^3y^4, x, y] gives the correct output 12x^2y^3. I hope I'm not flogging a dead horse. I did a search but found nothing on this. Thanks, Will