Interchangeable variables and values

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• • An example Two nodes are interchangeable • • If they have the same neighbours Variables partition into interchangeable classes All colours are interchangeable • Values are fully interchangeable X1 X2 X3 X4 X5
• • Variables partition into two equivalence classes • • X1, X2 X3, X4, X5 Values partition into one equivalence class • • 1, 2, 3 An example (Or red, green, blue if you prefer) X1 X2 X3 X4 X5
Page 1 and 2: Interchangeable variables and value
Page 3 and 4: Types of symmetry • Which part of
Page 5 and 6: Adding constraints • Same method
Page 7 and 8: Interchangeable variables and value
Page 9 and 10: Signature of an assignment • Can
Page 11 and 12: Signature of an assignment • Supp
Page 13 and 14: Signature of an assignment • Sign
Page 15: Ordering signatures • To break al
Page 19 and 20: Ordering signatures • Equivalent
Page 21 and 22: Some special cases • All variable
Page 23 and 24: Conclusions • Symmetry occurs in

Interchangeable variables and values

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