From @Caltech legend Tom Apostol who was teaching me calculus the same year this paper was published
-
-
Thanks. Twitter will use this to make your timeline better. UndoUndo
-
-
-
But how could Euler have justified the swapping of an integral and an infinite sum as shown here?pic.twitter.com/a3qo02QDzz
-
Euler's proof if I recall it correctly involved factorising an infinite expansion of sin(sqrt x) as if it was a polynomial. Groundbreaking.
End of conversation
New conversation -
-
-
Sum of 1/n^2, it is funny how I just encountered this in class. Keep the good work!
Thanks. Twitter will use this to make your timeline better. UndoUndo
-
-
-
Thanks. Twitter will use this to make your timeline better. UndoUndo
-
Loading seems to be taking a while.
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.