CP
2005
Springer
14 years 9 months ago
2005
Springer
Conditional symmetry arises in a sub-problem of a constraint satisfaction problem, where the sub-problem satisfies some condition under which additional symetries hold. Typically...
CP
2007
Springer
14 years 10 months ago
2007
Springer
We introduce groupoids – generalisations of groups in which not all pairs of elements may be multiplied, or, equivalently, categories in which all morphisms are invertible – as...