Re: Usage of **
- To: mathgroup at smc.vnet.net
- Subject: [mg84737] Re: Usage of **
- From: Hauke Reddmann <fc3a501 at uni-hamburg.de>
- Date: Fri, 11 Jan 2008 22:10:00 -0500 (EST)
- References: <fm4sh7$c06$1@smc.vnet.net> <fm7e6q$f11$1@smc.vnet.net>
Michael Weyrauch <michael.weyrauch at gmx.de> wrote:
> Hello,
> of course, you can do that.
> You can use **, which is Protected, Unprotect it and give it the properties you need, including
> things like (x*A)**(y*B)=x*y*(A**B)).
I'm *still* a total dummy yet :-)
*How* do I teach some F[x_,y_] that it is a linear operator?
(I wouldn't be surprised if Mathematica would somewhere
have a knob Properties->Linear for F.)
Of course the tricky part with F[s*x,y]->s*F[x,y] is how
the rule knows that s is the scalar and x the generator...
--
Hauke Reddmann <:-EX8 fc3a501 at uni-hamburg.de
Er-a svo gott sem gott kveða
öl alda sonum, því að færra veit
er fleira drekkur síns til geðs gumi.