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Christian's user avatar
Christian's user avatar
Christian
  • Member for 5 years, 8 months
  • Last seen more than 4 years ago
7 votes
Accepted

Heisenberg uncertainty principle: a proof for a beginner

3 votes
Accepted

Show that there is a continuous real function $h$ on $[0,1]$ such that $\lim \sup |\frac{h(x+t)-h(x)}{t}| = \infty$ for all $x \in [0,1)$

3 votes
Accepted

Differentiation operator is closed on $L^2[0,1]$?

2 votes
Accepted

How prove that $\frac{1}{ 2 π i}\int_{ |z|=R} z^{ n−1} |f(z)|^ 2 dz = a_0 \bar{a_n} R^{ 2 n} $.

1 vote
Accepted

Cauchy's Integral formula real part confusion

1 vote
Accepted

Convex function $f$ in $R^n$, how to show we can always find a tangental line $g \leq f$?

1 vote
Accepted

Let $C$ be compact sets. $\bigcap_{i \in K} (C_i)=\emptyset \Rightarrow \exists F \subseteq K \; \text {finite} | \bigcap_{i \in F} (C_i) = \emptyset$

1 vote
Accepted

If $W$ is T-invariant, $W=(W\cap W_{1})\oplus\cdots\oplus (W\cap W_{k})$

0 votes

Check Lipschitz condition

0 votes

Is there a visualization for inverse trig functions as indefinite integrals

0 votes

If $z^{3/2}$ is analytic then why its integral over a closed arc is nonzero?