Misc,

A more accurate treatment of the problem of drawing the shortest line on a surface

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(January 2008)

Abstract

E727 in the Enestrom index. This is a translation from the Latin original Äccuratior evolutio problematis de linea brevissima in superficie quacunque ducenda" (1779). Given a surface \$pdx+qdy+rdz=0\$, Euler wants to develop equations that give the geodesics on this surface. I am new to the calculus of variations, so it is not clear to me what steps follow from results that are previously known (like the Euler-Lagrange equation in the calculations) and what steps follow from earlier in this paper. I would appreciate comments from any readers who are familiar with calculus of variations.

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