Calcul des variations
https://fr.wikipedia.org/wiki/Calcul_des_variationsCommande optimale
https://fr.wikipedia.org/wiki/Commande_optimaleFonctionnelle
https://en.wikipedia.org/wiki/Functional_(mathematics)Functional derivative
https://en.wikipedia.org/wiki/Functional_derivativeCalcul variationnel, Bahram Houchmandzadeh, U.Grenoble
https://www-liphy.ujf-grenoble.fr/pagesperso/bahram/Math/chap_CalculVariation.pdfCalcul des variations, Pierre Pansu, U.Psud
https://www.math.u-psud.fr/~pansu/web_dea/chapitre1.pdfFundamental lemma of calculus of variations
https://en.wikipedia.org/wiki/Fundamental_lemma_of_calculus_of_variations