# Integral equations contradict The Uncertainty Principle?

I was reading about Integral equations, and I found this excerpt in Portuguese Wikipedia:

"integral equations serve to determine the position in all instances of an object, if known, its instantaneous velocity at all times"

For instance, in 1927, Werner Heisenberg stated that the more precisely the position of some particle is determined, the less precisely its momentum can be known, and vice versa.

What's wrong in my conclusion? Really the two principles contradict each other?

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One is classical mechanics, the other is quantum. That's it. –  jinawee May 16 at 13:31

@LucasAbilidebob there are integral forms of the quantum equations. They start with a cloud of probability at $t=0$, and give you the evolution of that fuzzy cloud along time. –  Davidmh May 16 at 18:24