Johann Friedrich Pfaff
| Johann Friedrich Pfaff | |
|---|---|
| Born | 22 December 1765 | 
| Died | 21 April 1825 (aged 59) | 
| Alma mater | University of Göttingen | 
| Known for | Pfaffians Pfaffian constraint Pfaffian function Pfaffian system Pfaffian orientation | 
| Scientific career | |
| Fields | Mathematics | 
| Institutions | University of Helmstedt Halle University | 
| Doctoral advisor | Abraham Kästner Johann Elert Bode | 
| Doctoral students | Carl Friedrich Gauss August Möbius Karl Mollweide | 
| Other notable students | Johann Christian Martin Bartels | 
Johann Friedrich Pfaff (sometimes spelled Friederich; 22 December 1765 – 21 April 1825) was a German mathematician. He was described as one of Germany's most eminent mathematicians during the 19th century. He was a precursor of the German school of mathematical thinking, under which Carl Friedrich Gauss and his followers largely determined the lines on which mathematics developed during the 19th century.