| dbp:defn
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- may mean that is a subset of , and is possibly equal to ; that is, every element of belongs to ; expressed as a formula, . (en)
- In topology, denotes the connected sum of two manifolds or two knots. (en)
- may mean that is a proper subset of , that is the two sets are different, and every element of belongs to ; expressed as a formula, . (en)
- Primorial: denotes the product of the prime numbers that are not greater than . (en)
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