Proper Subset Relation

A Proper Subset Relation is a Subset Relation that is False If X₁≡X₂.

• AKA: Proper Subset, ⊂, ProperSubset, Proper Subset Operation.
• Example(s):
  • {1, 2} ⊂ {1, 2, 3}.
  • …
• Counter-Example(s):
  • {1, 2, 3} ⊆ {1, 2, 3}.
• See: Subset Operation, Intersection Set Operation, Set Equivalence Relation.

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