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Homework Statement
A canonical transformation is made from (p,q) to (P,Q) through a generating function F=a*cot(Q), where 'a' is a constant. Express p,q in terms of P,Q.
Homework Equations
The Attempt at a Solution
A generating function is supposed to be a bridge between (p,q) and (P,Q), right? Now, if there is no functional dependence of F on p or q, that is the old variables, how is one supposed to find out the contact transformation asked for?