Thursday, May 16, 2013

Invert, always invert

If f and f−1 are inverses, then the graph of the function
y = f^{-1}(x)\,\!
is the same as the graph of the equation
x = f(y) . \,\!
  the solution of many hard problems can be clarified by re-expressing them in inverse form.

"Invert, always invert",Carl Gustav Jacob Jacobi 

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