'''Trefftz''' is a German surname.
It can refer to: *Erich Trefftz (1888–1937), German mathematician **Trefftz method, a method for the numerical solution of partial differential equations *Eleonore Trefftz (1920–2017), German physicist, Erich Trefftz's daughter **7266 Trefftz, a minor planet named after Eleonore Trefftz
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