"German mathematician" . . . . . . . . . "1979Z"^^ . . . . . . . . "1898-08-25Z"^^ . . . . "1898Z"^^ . . "1979-12-26Z"^^ . "Helmut Hasse (German: [\u02C8has\u0259]; 25 August 1898 \u2013 26 December 1979) was a German mathematician working in algebraic number theory, known for fundamental contributions to class field theory, the application of p-adic numbers to local classfield theory and diophantine geometry (Hasse principle), and to local zeta functions."@en . "Helmut Hasse"@en . "Hasse, Helmut"@en . . . . .