An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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Lagrangian formalism
  دیسه‌گرایی ِ لاگرانژ  
disegerâyi-ye Lâgranži
Fr.: formalisme lagrangien  

A reformulation of classical mechanics that describes the evolution of a physical system using → variational principle The formalism does not require the concept of force, which is replaced by the → Lagrangian function. The formalism makes the description of systems more simpler. Moreover, the passage from classical description to quantum description becomes natural.
Same as → Lagrangian dynamics.

See also: → Lagrangian; → formalism.