Extreme point of unit balls, over $\mathbb C$
112597
Extreme point of unit balls, the complex case
105046
Extreme points of the unit ball of the space $c_0 = \{ \{x_n\}_{n=1}^\infty \in \ell^\infty : \lim_{n\to\infty} x_n = 0\}$
144362
The construction of a Vitali set
115781
Proof about Holomorphic functions in the unit disc
31303
If $p\in\Bbb Z[X]$ show that: $ \max\limits_{x\in [0,1]}\left|p(x) \right| > \frac{1}{e^{n}}. $
47419
Asymptotics of uniformly continuous functions over $\mathbb R$
12467
Why does this proof work: Closed unit ball in $C_0$ is not compact
34173
Banach spaces and their unit sphere
27587
inequality on the unit disk
149544
maximum of monic polynomial on unit circle is 1 implies $p(z)=z^n$
84921
Fitting an infinite collection of balls in an infinite dimensional unit ball
33642
Finite dimensional subspace of $C([0,1])$
73462
Nested sequences of balls in a Banach space
108997
Continuous functions that attain local extrema at every point
9748
Maximum modulus principle for an unbounded function in the half right plane
52014
Showing $(C[0,1], d_1)$ is not a complete metric space
92802
Proof of Borsuk-Ulam Theorem .