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Peter Melech
  • Member for 6 years, 11 months
  • Last seen this week
  • Aachen, Germany
7 votes

Why two formulas for a in a linear function are equal

7 votes
Accepted

Why is the horizontal asymptote of $\lim_{x \to \infty} \frac{x}{x^2+1}$ $y=0$?

6 votes

Proof Verification: Differentiability implies continuity.

5 votes

A Banach Space cannot have a denumerable basis:Why is it true?

5 votes
Accepted

Definition of annihilator is not clear

5 votes
Accepted

Elements of $\mathbb{Z}_2[X]/(X^2+X+1)$

5 votes

When should I take conjugate transpose of a complex matrix, and when transpose of it?

5 votes
Accepted

$f^{(2)}$ is not defined in an analysis book, where $f$ is a mapping from $\mathbb{R}^n$ to $\mathbb{R}^m$. Why?

4 votes
Accepted

How is Riesz Lemma "a substitute for orthogonality"?

4 votes
Accepted

Confused about exponent rule.

4 votes

Continuous map between $L^p$ spaces

4 votes

Validity of Using Induction to Show Union of an Infinite Ascending Chain of Subgroups is a Subgroup

4 votes
Accepted

Find the limit as $x \to 0$ with integral from $0$ to $x$ of $\cos(t^3)/(t+x)$

4 votes
Accepted

Simple Single Variable Equation

3 votes

Proof on orthogonal projectors

3 votes
Accepted

Is $(((a \text{ mod } n)* a \text{ mod } n) * a \text{ mod } n) = a*a*a \text{ mod } n$?

3 votes

What is the difference between using maximal ideals to define Zariski topology versus using prime ideals?

3 votes
Accepted

Probability of rolling a die twice

3 votes

Is every eigenvector of AA an eigenvector of A?

3 votes

Absolute value of a matrix

3 votes

Proof of the separability of $L^p (X,\mathcal{A},\mu)$ when $1 \leq p < \infty$ and $\mu$ is $\sigma$-finite.

3 votes

Find the matrix of $\langle f, g \rangle = \displaystyle\int_0^1 f(t) g(t) \, \mathrm dt$ with respect to the basis $\{1,t,\dots,t^n\}$

3 votes

algebrainc proof for $\alpha\beta \leq \frac{\alpha^p}{p} + \frac{\beta^q}{q}$ for conjugate exponents p and q

3 votes

matrix analysis and rank of matrix

3 votes

The inverse of bounded operator?

3 votes

How can I determine the arguments that make the matrix be one, no solution.

3 votes
Accepted

If $\dim \ker(T-3i I)=3$, determine all possibilities for the Jordan canonical form of $T$.

3 votes
Accepted

Struggle with Hilbert Space inequality

3 votes

What is different between field and finite field?

3 votes
Accepted

Find all similar matrices to (alpha)I

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