stofnbrot

From stofn (“stem, trunk”) +‎ brot (“fraction, fractional number”).

stofnbrot n (genitive singular stofnbrots, nominative plural stofnbrot)

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

   Synonym: hlutbrot

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