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Carl Gottlieb Ehler (8 September 1685 – 22 November 1753) is considered a mathematician, specifically due to his post as an astronomer in Berlin. He was mayor of the Prussian capital of Danzig from March 1741 until his death.
From Wikipedia \In mathematics, topology (from the Greek topos, 'place', and logos, 'study') is concerned with the properties of a geometric object that are preserved under continuous deformations, such as stretching, twisting, crumpling and bending, but not tearing or gluing." Geometry vs Topology.
Being a master of calculations, Euler at first did not recognize the problem of the bridges of Königsberg as a mathematical problem at all. When his friend Carl Gottlieb Ehler in a letter of 1736 asked Euler about a solution to the problem Euler answered:
• 1736 Correspondences with Carl Gottlieb Ehler (1685-1753) • Ehler’s Letter \You would render to me and our friend Kuhn a most valuable service, putting us greatly in your debt, most learned sir, if you would send us the solution, which you know well, to the problem of the seven K onigsberg bridges together with a proof.
Carl Leonhard Gottlieb Ehler, mayor of Danzig, asked Euler for a solution to the problem of the seven bridges of Königsberg.
Nov 25, 2020 · Apparently, Euler was asked about the Königsberg bridge problem by Carl Gottlieb Ehler, an astronomer, mathematician, and later a mayor of Danzig. In his reply to Ehler in 1736 Euler dismissed the problem as not even mathematical:
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• 1736 Correspondences with Carl Gottlieb Ehler (1685-1753) • Ehler’s Letter \You would render to me and our friend Kuhn a most valuable service, putting us greatly in your debt, most learned sir, if you would send us the solution, which you know well, to the problem of the seven K onigsberg bridges together with a proof.
