KnowraFermat's principleLinked fromLinked fromThe 17 pages that link to Fermat's principle, each with the reason it gives.All 17Broader topic 1Related 13Compared with 3Euler–Lagrange EquationCompared with: It is a physical variational principle, while the Euler–Lagrange equation is the condition derived from such principles.Fermat pointCompared with: It shares Fermat's name but concerns light paths, not a triangle's distance-sum minimum.Pierre Louis MaupertuisCompared with: Its earlier use of an extremum principle prompted comparisons with Maupertuis’s proposal for mechanics.