[Date Index] [Thread Index] [Author Index]

Ranges for Variables

• To: mathgroup at yoda.physics.unc.edu (Mathematica User's Group)
• Subject: Ranges for Variables
• From: Keith Clay <clay at galileo.phys.washington.edu>
• Date: Mon, 12 Oct 92 23:10:21 MDT

Dear group:

This one seems simple, but a general solution evades me.
Let's say I want to tell Mathematica that every time the
variable called "a" appears it is positive, or that every
time the variable "b" appears it is between, say, 0 and 1.

This avoids searching for factors of I Pi when Mathematica
spits out output containing Log[-a] or Sqrt[b-1].  One can
write chains of "ConditionQ" statements each time a function
call is made, but is there a direct way of doing this in 
advance so that the conditions will be applied for the rest
of a Mma session?

Keith (clay at galileo.phys.washington.edu)