I can't prove the Archimedes' principle in a particular case
74348
How does the buoyant force on a cube at the bottom of a tank of water manifest itself?
27782
Why does this proof of the chain rule not work?
61242
L'Hôpital's rule does not apply?!
98377
How can I prove this limit doesn't exist?
56623
Stuck trying to prove an inequality
40549
How to proof the the derivative of $x^2$ is $2x$?
90818
Can't Prove formula from Sakurai's Modern QM @ Perturbation Theory
19828
Show that $\frac{x^3}{x^2+y^2}$ is not differentiable at $(0,0)$, even though all directional derivatives exist
156669
Trying to prove a simple (?) inequality
20863
how do I prove this inequallity?
32130
How to prove that a limit does not exist?
95145
Does $\exp(2ir\pi)$ equal $1$? What's wrong?
53123
Trying to derive a contradiction with this simple inequality,
135359
How to prove that limit doesn't exist using epsilon-delta definition?
111094
Help with proving that $\pi$ is irrational
98537
What is wrong with the proof?
50804
It seems obvious, but how to prove it formally?