Ehrenfried Walter von Tschirnhaus

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Born: 10 April 1651 in Kieslingswalde (near Görlitz), Germany
Died: 11 Oct 1708 in Dresden, Germany

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Tschirnhaus began a European tour in 1674, visiting England where he met Wallis in Oxford and Collins in London. He also visited Leiden and then Paris where he remained for a while after meeting Leibniz and Huygens.

Tschirnhaus worked on the solution of equations and the study of curves. He discovered a transformation which, when applied to an equation of degree n, gave an equation of degree n with no term in x^n-1 and x^n-2.

He also studied catacaustic curves in 1682, these being the envelope of light rays emitted from a point source after reflection from a given curve. There is a sinusoidal spiral named after him.

For some time Tschirnhaus had one aim in life and that was to obtain a paid position at the Académie Royal des Sciences in Paris. He was elected a member in 1682 but no pension came with the appointment.

Tschirnhaus was a scientist, and among other things, he experimented making porcelain from clay mixed with fusible rock in the 1680s. A factory at Meissen started production of his porcelain in 1710 and the first sales of any consequence of Tschirnhaus's porcelain took place at the Leipzig Fair in 1713.

In 1706 Sweden invaded and Tschirnhaus was in some trouble. However after the war he was offered the position of Chancellor at the University of Halle but remained on his family estate of Kieslingswald. There was great competition from governments to obtain his porcelain techniques but Tschirnhaus kept them for himself and ended his life deeply in debt.

Article by: J J O'Connor and E F Robertson

JOC/EFR February 1997 The URL of this page is:	School_of_Mathematics_and_Statistics University_of_St_Andrews,_Scotland
http://www-history.mcs.st-andrews.ac.uk/history/Mathematicians/Tschirnhaus.html