semiperfect

Adjective

Meaning

Approaching perfection; not entirely perfect.

(mathematics) Of a ring over which every finitely generated left module has a projective cover.

(mathematics) Of an integer equal to the sum of all or some of its proper divisors.

Examples

A semiperfect number is a natural number that is equal to the sum of all or some of its proper divisors. Source: Internet

A semiperfect number that is equal to the sum of all its proper divisors is a perfect number. Source: Internet

These diamonds are generally small, perfect to semiperfect octahedra, and are used to polish other diamonds. Source: Internet

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