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Directional derivative
[ar] مشتق اتجاهي
[ca] Derivada direccional
[cv] Ен тĕлĕшри тăхăм
[de] Richtungsableitung
[es] Derivada direccional
[fa] مشتق جهتدار
[fi] Suunnattu derivaatta
[fr] Dérivée directionnelle
[he] נגזרת כיוונית
[it] Derivata direzionale