Re: UnitStep

*To*: mathgroup at smc.vnet.net*Subject*: [mg52343] Re: UnitStep*From*: Peter Pein <petsie at arcor.de>*Date*: Wed, 24 Nov 2004 02:32:14 -0500 (EST)*References*: <cnuoh9$sql$1@smc.vnet.net>*Sender*: owner-wri-mathgroup at wolfram.com

Blimbaum, Jerry AA R22 wrote: > Why does the following give me 'indeterminate, infinite expression > encountered', etc. instead of zero.... > > > (1/p) UnitStep[p-1] /.p->0 > > > I defined a function using the UnitStep because p could = 0 and I > thought this would be the way around that problem.......but didnt work > the way I expected..... > > > jerry blimbaum > > Jerry, what you get is 0/0, which is not (and must not be) defined. Use If[p<1, 0, 1/p] instead. -- Peter Pein 10245 Berlin