Most programming languages support global variables, but they tend to do it in different ways. For example, PHP uses the global keyword to access a variable declared outside any function: ...

For example, a variable can be used in the program that controls an automatic car park barrier. It can keep track of the number of cars going in and out and decide whether to let more cars in.

In the first part of this paper, the concept of logical reduction is presented. Minimal preferred variable inequalities are introduced, and algorithms are given for their calculation. A simple ...

The row with BINARY type indicates that this problem is a mixed integer program and all the integer variables are binary. The integer values of the row set an ordering for PROC LP to pick the ...

Mathematical programming discriminant analysis models must be normalised to prevent the generation of discriminant functions in which the variable coefficients and the constant term are zero. This ...