Hi I'm a newbie. I'm an engineer trying to solve some practical problems related to particles. I'm trying to use sets and logic to create an environment where I can model these babies, and I'm new to set theory. For re-assurance (and I'm sure, some help), I'd be grateful if I could get some feedback as to whether some of these sets are decypherable. I hope that this is the right place to post this... Here's one: What I'm trying to say here is: If the real value b (that is associated with the particle w_i) is a part of the real interval lambda_j (that is associated with lambda) then the w_i is a part of the set Lambda_j; this is to be applied to all particles w_i of the domain Omega...with the intention that the Lambda_J will be created with a 1 to 1 correspondence to lambda_j. I have created the Coordinate set C_Lambda because I want to use this when the random variables are created later, so it is a kind of property of Lambda. Is this what you see? Any feedback would be greatly appreciated.