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Minus sign point particle action

by alejandrito29
Tags: action, minus, particle, point, sign
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Mar9-12, 07:47 PM
P: 143
what means the minus sign in

the point particle action

[tex] S = - mc \int ds [/tex]

or nambu goto action

[tex] S= - \frac{T}{c} \int dA [/tex] ?????????
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