Interchangeable variables and values
Interchangeable variables and values
Interchangeable variables and values
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<strong>Interchangeable</strong><br />
<strong>variables</strong> <strong>and</strong> <strong>values</strong><br />
• Often <strong>variables</strong> <strong>and</strong> <strong>values</strong> partition<br />
interchangeable sets<br />
• Timetabling<br />
• Class[i]=j iff class i occurs at time j<br />
• Classes taken by same students<br />
interchangeable (partition into sets)<br />
• All times interchangeable
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