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giobrach
  • Member for 8 years, 2 months
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36 votes

How to perform wedge product

16 votes

"An affine space is nothing more than a vector space whose origin we try to forget about, by adding translations to the linear maps."

8 votes
Accepted

If the total differential is a scalar, how can it also be a covector used to calculate the directional derivative at a point?

7 votes
Accepted

Representing $\sum\limits_{n=1}^\infty a_{n-1}a_nz^n$ in terms of $\sum\limits_{n=0}^\infty a_nz^n$

7 votes

How's g(x) = sin(x)/x removal discontinuity?

7 votes
Accepted

Integration using digamma functions

6 votes
Accepted

Prove that $\int_{0}^{a}dx\int_{0}^{x}dy\int_{0}^{y}f(x)f(y)f(z)dz=\frac{1}{3!}\left(\int_{0}^{a}f(t)dt\right)^3$.

6 votes
Accepted

Computing a certain definite integral of an even function knowing another one

6 votes
Accepted

Notation: $\nabla \cdot$, div, $\nabla$, grad, ...?

6 votes

did i just find proof that grandi's series equals zero?

5 votes
Accepted

Covariant derivative for higher rank tensors

5 votes
Accepted

Chain Rule for Surface Differentials

5 votes

Prove that $\sum\limits_{n=0}^\infty\binom{2n}n\frac n{4^n(n+1)^2}=\ln(16)-2$

4 votes

Vector space, norm and metric

4 votes

Is $\lim_{z \rightarrow z_0} zf(z) = 0$ sufficient to show $f(z)$ has a removable singularity or must we check $\lim f(z)$?

4 votes
Accepted

Expand $(2i-2)^{38}$ using de Moivre's formula

4 votes

Laplace transform for distributions

4 votes
Accepted

Lagrange theorem in a limit of a summation

4 votes
Accepted

Why is length often a unitless quantity in mathematics?

4 votes
Accepted

Notational confusion concerning differential equations?

4 votes

Is the ring and semi-ring definition of algebra and set linked?

4 votes

Rudin Theorem 3.44 explanation

4 votes

Definite integral $\int_0^{\pi} \sin^{n} x \ln(\sin x) dx$?

4 votes
Accepted

Showing that a radical function is continuous

4 votes

Derivative of $\sin(x)$: how to avoid circular reasoning?

3 votes

Metric on $\mathbb R$ such that $\overline{(0,1)}=[0,1]\cup\{2\}$

3 votes
Accepted

Confusion on Wikipedia Intuition on Differential Forms

3 votes

Are $\frac{dy}{dx}=-\frac{∂f/∂x}{∂f/∂y}$ and $(\frac{∂x}{∂y})_{z}(\frac{∂y}{∂z})_{x}(\frac{∂z}{∂x})_{y}=-1$ the same thing?

3 votes
Accepted

Composition of non-continuous functions continuous

3 votes

How do I compute the following complex number?

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