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Infinite set - set with infinite number of elements

Empty set / null set - ø - set with no elements

Unit set - set with only 1 element

Joint sets - if two or more sets have at least 1 element in common

Disjoint sets - if two or more sets have no element in common

Equal sets - sets with exact same elements

Equivalent sets - sets with the same cardinality (number of elements)
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