Wikiadmin1: Created page with " More formally, action is a mathematical functional which takes the trajectory (also called path or history) of the system as its argument and has a real number as its result. Generally, the action takes different values for different paths.{{cite encyclopedia |last1=Goodman |first1=Bernard |title=Action |date=1993|encyclopedia=McGraw-Hill Encyclopaedia of Physics |publisher=McGraw-Hill |location=New York |editor=..."

2023-01-27T14:47:16Z

Created page with " More formally, action is a mathematical functional which takes the trajectory (also called path or history) of the system as its argument and has a real number as its result. Generally, the action takes different values for different paths.<ref name="mcgraw1">{{cite encyclopedia |last1=Goodman |first1=Bernard |title=Action |date=1993|encyclopedia=McGraw-Hill Encyclopaedia of Physics |publisher=McGraw-Hill |location=New York |editor=..."

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More formally, action is a [[functional (mathematics)|mathematical functional]] which takes the [[trajectory]] (also called path or history) of the system as its argument and has a [[real number]] as its result. Generally, the action takes different values for different paths.<ref name="mcgraw1">{{cite encyclopedia |last1=Goodman |first1=Bernard |title=Action |date=1993|encyclopedia=McGraw-Hill Encyclopaedia of Physics |publisher=McGraw-Hill |location=New York |editor=Parker, S. P.|isbn=0-07-051400-3|page=22 |edition=2nd |url=https://archive.org/details/mcgrawhillencycl1993park/page/22/mode/2up}}</ref> Action has [[dimensional analysis|dimensions]] of [[energy]] × [[time]] or [[momentum]] × [[length]], and its [[SI unit]] is [[joule]]-second (like the [[Planck constant]] ''h'').<ref>{{cite encyclopedia |last1=Stehle |first1=Philip M. |title=Least-action principle |date=1993|encyclopedia=McGraw-Hill Encyclopaedia of Physics |publisher=McGraw-Hill |location=New York |editor=Parker, S. P.|isbn=0-07-051400-3|page=670 |edition=2nd |url=https://archive.org/details/mcgrawhillencycl1993park/page/670/mode/2up}}</ref>

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