Karl Wilhelm Pohlke

Karl Wilhelm Pohlke (28 January 1810 in Berlin – 27 November 1876 in Berlin) was a German painter who established an important geometric statement, which is fundamental for axonometric projections. The statement is called Pohlke's theorem.

Life

Karl Wilhelm Pohlke was taught painting by

in Berlin and participated in his first exhibition there in 1832. After finishing his studies he earned his living for some years painting landscapes and teaching perspective drawing privately. In 1835 Pohlke went to France and improved his abilities at the .

Between 1860 and 1876 he published a textbook on descriptive geometry, consisting of two volumes, where he introduced (in the 1st volume) his statement, later called "Pohlke's theorem" on axonometric projections: "Any three line segments ${\displaystyle {\overline {O}}{\overline {U}},{\overline {O}}{\overline {V}},{\overline {O}}{\overline {W}}}$ in a plane but not on a line can be considered as the parallel projection of three edges ${\displaystyle OU,OV,OW}$ of a cube." This theorem is the mathematical justification of a commonly used drawing method and is a remarkable contribution of an artist to mathematics.

Selected works

Book

• Zehn Tafeln zur darstellenden Geometrie. Gaertner-Verlag, Berlin 1876 (Google Books.)
  • 1st volume: Darstellung der geraden Linien und ebenen Flächen,so wie der aus ihnen zusammengesetzten Gebilde, vermittelst der verschiedenen Projektionsarten
  • 2nd volume: Darstellung einiger krummer Linien und krummen Flächen

Paintings

• Brunnen am Vierwaldstätter See,
• Blick auf Glienicke, at Glienicke Palace, Berlin

External links

• Pohlke's Theorem -- from Wolfram MathWorld
• Institut für Mathematik und Informatik der Universität Greifswald: Mathematik und Kunst: Karl Wilhelm Pohlke