Re: [Help-glpk] Question about modeling in MathProg

[glpk xypron]

Hello Aly,

> 1. In question 1 below, do I have to define the set T by "set T :=
> {1..10};" ? Couldn't it be "set T;" and then from the data the model would
> identify the cardinality of the set T by itself? Cause I'd like the model to 
> be
> general for any instance size.
You can initialize sets and parameters in either of:
the declaration
the data section
a table statement (see doc/tables.pdf) using a SQL data base, a CSV file, or a 
DBF file.

> 2. Is there a difference between "var x{T};" and "var x{t in T}>=0;" ?
var x{T} is unbounded and the same as var x{t in T}
var x{T} >=0 is lower bounded
var x{T} <=0 is upper bounded
var x{T} >=0,<=4 is double bounded

Best regards

Xypron
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