hálfgrúpa

Icelandic

Etymology

From hálf- (“half-”) +‎ grúpa (“group”).

Noun

hálfgrúpa f (genitive singular hálfgrúpu, nominative plural hálfgrúpur)

  1. (mathematics) a semigroup; (any set for which there is a binary operation that is both closed and associative)

Declension
declension of hálfgrúpa
f-w1 singular plural
indefinite definite indefinite definite
nominative hálfgrúpa hálfgrúpan hálfgrúpur hálfgrúpurnar
accusative hálfgrúpu hálfgrúpuna hálfgrúpur hálfgrúpurnar
dative hálfgrúpu hálfgrúpunni hálfgrúpum hálfgrúpunum
genitive hálfgrúpu hálfgrúpunnar hálfgrúpa hálfgrúpanna

Derived terms
  • styttin hálfgrúpa (“cancellation semigroup”)
  • hálfgrúpumótun (“semigroup homomorphism”)
  • hálfgrúpa með hlutleysu (“semigroup with identity element, monoid”)
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