dirichlet

noun

1. Pe·ter Gus·tav Le·jeune [pey-tuh r goo s-tahf luh–zhœn] /ˈpeɪ tər ˈgʊs tɑf ləˈʒœn/, 1805–59, German mathematician.

noun

1. Peter Gustav Lejeune (ˈpeːtər ˈɡʊstaf ləˈʒœn). 1805–59, German mathematician, noted for his work on number theory and calculus