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Congruence vs Undefined - What's the difference?

congruence | undefined |

As a noun congruence

is the quality of agreeing or corresponding; being suitable and appropriate.

As an adjective undefined is

lacking a definition or value.

congruence

English

(wikipedia congruence)

Noun

(en noun)
  • The quality of agreeing or corresponding; being suitable and appropriate.
  • (mathematics, number theory) a relation between two numbers indicating they give the same remainder when divided by some given number
  • (mathematics, geometry) being isometric — roughly, the same size and shape
  • (algebra) more generally: any (l) defined on an (l) which is preserved by defined by the structure

    • See also

    * residue

    Synonyms

    * congruency, congruity

    Related terms

    * congruent

    undefined

    English

    Adjective

    (wikipedia undefined) (-)
  • Lacking a definition or value.
  • (mathematics, computing) That does not have a meaning and is thus not assigned an interpretation.
    • The result of division by zero is undefined .

    Antonyms

    * defined