Re: dot minus operator
- To: mathgroup at smc.vnet.net
- Subject: [mg73190] Re: [mg73182] dot minus operator
- From: Bob Hanlon <hanlonr at cox.net>
- Date: Wed, 7 Feb 2007 04:49:58 -0500 (EST)
- Reply-to: hanlonr at cox.net
minus[a_Integer,b_Integer]:=(a-b)*UnitStep[a-b];
Format[minus[a_,b_]]:=DisplayForm[RowBox[
{a, OverscriptBox["-","."], b}]];
a~minus~b
3~minus~b
a~minus~3
5~minus~3
2
3~minus~5
0
Bob Hanlon
---- "Brambilla Roberto Luigi (CESIRICERCA)" <Roberto.Brambilla at cesiricerca.it> wrote:
> Hi All,
>
> How can I define in the the infix style the (integer) operation
>
> minus[a_,b_]:=If[a>b,a-b,0]
>
> In std texts it is usually noted by a minus with a dot over it.
> It would be fine to use the same notation.
>
> Thanks in advance Roberto
>