Making your own Definitions using Operators without built in meanings

*To*: mathgroup at smc.vnet.net*Subject*: [mg102282] Making your own Definitions using Operators without built in meanings*From*: "fizzy" <fizzycist at knology.net>*Date*: Tue, 4 Aug 2009 04:26:47 -0400 (EDT)

In the BasicTypsetting pallete , under Operators, there is the 'x' symbol (small 'x', 2nd 'x' in the row ) which is defined as Cross...and also, there is CenterDot next to it which is not defined at all... First, I wonder why the small 'x' is pre-defined as Cross whereas CenterDot is not pre-defined as Dot?.....I would have assumed that neither be defined or both be defined... 2nd....the Documentation shows how to define CenterDot as Dot , etc...so no problem there....however, if I combine Del from the Pallette with either the small 'x' or the CenterDot, e.g. Del CenterDot f_:=Div[f], .....then I get an error message that Del cannot be followed by CenterDot f_.......... and the same if I define..... Del 'x' f_:=Curl[f] Is there a way to do these??... thank you....Jerry Blimbaum