[Help-glpk] Re: How to make consecutive variables take a certain value?

[Andrew Makhorin]

> The problem is a timetabling problem, and indeed there are three
> indices "x_dhc" standing for day,hours and classroom and there are sessions 
> which has 2, 3 and 4 hours length of duration .I'm trying to allocate 
> available hours of every classroom in a week.

Probably the following paper might be interesting to you:

L. M. Bezeau (1993) "Timetabling an Academic Department with Linear
Programming", University of New Brunswick.

See http://www.unb.ca/centres/nbcea/lptimtab.html .