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Jan 10, 2018 at 15:45 comment added Alexei Boulbitch @ Carl Woll That was also my concern. On the other hand, taking a derivative is a rather standard trick for integral equations, though, of course, all information about A is lost.
Jan 10, 2018 at 15:10 comment added Carl Woll @AlexeiBoulbitch You're making the same error I originally made. Consider the equation $x^2=1$. Taking a derivative with respect to $x$ does not yield the same roots.
Jan 10, 2018 at 15:09 history edited Carl Woll CC BY-SA 3.0
Fix a few bugs
Jan 10, 2018 at 11:33 comment added Alexei Boulbitch I am not quite sure, but it seems that the by calculating the derivative of the initial equation with respect to u one immediately finds f^(-1)(u)==0, is not it?
Jan 9, 2018 at 22:34 history edited Carl Woll CC BY-SA 3.0
Remove unnecessary code
Jan 9, 2018 at 22:13 history undeleted Carl Woll
Jan 9, 2018 at 22:13 history edited Carl Woll CC BY-SA 3.0
Fix error
Jan 9, 2018 at 18:01 history deleted Carl Woll via Vote
Jan 9, 2018 at 17:39 comment added user56834 Where did you get $0=f^{-1}(u)$?
Jan 9, 2018 at 14:57 comment added user56834 I don't understand why those two constraints imply $a=0$?
Jan 9, 2018 at 14:36 history answered Carl Woll CC BY-SA 3.0