lejeune dirichlet 's work led later study algebraic number fields ideals published lejeune dirichlet 's lectures number theory ''vorlesungen ber zahlentheorie'' lectures number theory written blockquote although book assuredly based dirichlet 's lectures although dedekind referred book throughout life dirichlet 's book entirely written dedekind part dirichlet 's death edwards blockquote editions ''vorlesungen'' included supplements introducing notion ideal fundamental ring
Formal science Mathematics Pure mathematics Number theory Algebraic number theory