Services & Resources / Wolfram Forums
MathGroup Archive
*Archive Index
*Ask about this page
*Print this page
*Give us feedback
*Sign up for the Wolfram Insider

MathGroup Archive 1990

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

Search the Archive

Re: logical expressions

  • To: mathgroup at
  • Subject: Re: logical expressions
  • From: Jim_Wendel at
  • Date: Tue, 13 Nov 90 09:25:34 EST

This is about Paul Abbott's note of 10/28, logical expressions.
The second example, supposedly of an invalid formula, is incorrect,
in the sense that the formula evaluates to q for every p, not to false;
this is readily checked by doing a truth-table by hand.
Furthermore, what is the role of the quantity e=Rep[1,gbool,2}?
It evaluates to 1, so why not just use 1, or nothing at all in multiplicative
environments, e.g. and[x_,y_]:=x y, rather than e x y?

  • Prev by Date: 2D NIntegrate
  • Next by Date: User defined aliases
  • Previous by thread: 2D NIntegrate
  • Next by thread: User defined aliases