A function has at least 4 critical points on $[0,1]\times[0,1]$
71378
A smooth function $f:S^1\times S^1\to \mathbb R$ must have more than two critical points.
107727
$m\{x\in [0,1]:f'(x)=0\}>0$
14117
Holomorphic function has at most countably zeros
77331
$f$ function with $\nabla f=\bar{0}$
13398
Prove that the interval $(0, 1)$ and the Cartesian product $(0, 1) \times (0, 1)$ have the same cardinality
88271
Prove the exsistence of 3 zero points of a function
86105
Can $\{(f(t),g(t)) \mid t\in [a,b]\}$ cover the entire square $[0,1] \times [0,1]$ ?
14409
A problem about function N
55840
Number of functions from n-element set to {1, 2, …, m}
149605
Homeomorphism from $[0,1]\times[0,1]$ to $\overline{D}(0,1)$?
12239
Holomorphic function with a fixed point
144362
The construction of a Vitali set
18889
Measure of image of critical points set is equal 0
18611
An analytic function with a simple pole
70266
1-1 correspondence between [0,1] and [0,1)
55268
Differentiable and Continuous functions on [0,1] with 'weird' conditions.
19146
Showing that $f$ has exactly one fixed point