conditional limits

*To*: mathgroup at yoda.physics.unc.edu*Subject*: conditional limits*From*: kenward at mdd.comm.mot.com (Gary Kenward)*Date*: Wed, 1 Sep 93 11:38:09 PDT

I have a function of two variables, f[x, y], which when evaluated for values of x=y results in: 1 Power::infy: Infinite expression -- encountered. 0. As there is an (x-y) term in the denominator of the function. However, the Limit[f[x,y], x-y] does exist, and evaluates to a finite number. The question is, how do I construct a rule that conditionally evaluates the limit of f[x,y] rather than f[x,y] whenever x=y? Regards Gary Kenward Motorola Wireless Data Group