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Definition 2024

stofnbrot n ‎(genitive singular stofnbrots, nominative plural stofnbrot)

(arithmetic) a unit fraction; the fraction ${\tfrac {1}{n}}$ whose numerator is $1\,$ and whose denominator is the positive integer $n\,$ ; for example ${\tfrac {1}{5}}$ , ${\tfrac {1}{1}}$ or ${\tfrac {1}{42}}$
(mathematics) a partial fraction ^syn.

liðun í stofnbrot (expansion in partial fractions, partial fraction decomposition)
stofnbrotaliðun (expansion in partial fractions, partial fraction decomposition)