The Ehrenfried Walther von Tschirnhaus reference article from the English Wikipedia on 24-Apr-2004
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Ehrenfried Walther von Tschirnhaus

Helping orphans the way you would do it

Ehrenfried Walther von Tschirnhaus (or Tschirnhausen, 1651-1708) was a German mathematician.

See: Tschirnhaus transformation.