Re: The Del operator
- To: mathgroup at smc.vnet.net
- Subject: [mg24743] Re: The Del operator
- From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
- Date: Wed, 9 Aug 2000 02:31:49 -0400 (EDT)
- Organization: Universitaet Leipzig
- References: <8mdm7r$5o4@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
Jack Goldberg wrote: > > Hi, > > If you input Del[x] you get as output "inverted-delta"[x]. > I would like to incorporate a similar feature in a package I > am writing, to wit, > > The output of Chi[x,a,b] should be "Greek-lowercase chi"[x,a,b]. > > This must be very easy but I have not found reading these sections in > the Book very helpful. Thanks .. > > jack Hi, Format[Chi[a_, b_, c_], StandardForm] := "Greek-lowercase chi"[a, b, c] will do what you want. The more powerfull and modern version in the FE is MakeBoxes[Chi[a_, b_, c_], fmt_:StandardForm] := RowBox[{"a strange name with \[Chi] and \[SpaceIndicator] in it", "[", ToBoxes[a, fmt], ";", ToBoxes[b, fmt], "|", ToBoxes[c], "]"}] Hope that helps Jens