Ehrenfried Walther von Tschirnhaus in the context of N-ellipse

Meissen porcelain or Meissen china was the first European hard-paste porcelain. Early experiments were done in 1708 by Ehrenfried Walther von Tschirnhaus. After his death that October, Johann Friedrich Böttger continued von Tschirnhaus's work and brought this type of porcelain to the market, financed by Augustus the Strong, King of Poland and Elector of Saxony. The production of porcelain in the royal factory at Meissen, near Dresden, started in 1710 and attracted artists and artisans to establish, arguably, the most famous porcelain manufacturer known throughout the world. Its signature logo, the crossed swords, was introduced in 1720 to protect its production; the mark of the swords is reportedly one of the oldest trademarks in existence.

Dresden porcelain (or "china") was once the usual term for these wares, until in 1975 the Oberlandesgericht (Higher Munich State Court) decided in favour of the Saxon Porcelain Manufactory Dresden, which alone was then allowed to use the name Dresden Porcelain (it ceased producing in 2020).

Johann Friedrich Böttger (also Böttcher or Böttiger; 4 February 1682 – 13 March 1719) was a German alchemist. Böttger was born in Schleiz and died in Dresden. He is normally credited with being the first European to discover the secret of the creation of hard-paste porcelain in 1708, but it has also been claimed that English manufacturers or Ehrenfried Walther von Tschirnhaus produced porcelain first. Certainly, the Meissen factory, established 1710, was the first to produce porcelain in Europe in large quantities and since the recipe was kept a trade secret by Böttger for his company, experiments continued elsewhere throughout Europe.

In mathematics, a Tschirnhaus transformation, also known as Tschirnhausen transformation, is a type of mapping on polynomials developed by Ehrenfried Walther von Tschirnhaus in 1683.

Simply, it is a method for transforming a polynomial equation of degree ${\displaystyle n\geq 2}$ with some nonzero intermediate coefficients, ${\displaystyle a_{1},...,a_{n-1}}$, such that some or all of the transformed intermediate coefficients, ${\displaystyle a'_{1},...,a'_{n-1}}$, are exactly zero.