Mathematics
Erik André's user avatar
Erik André's user avatar
Erik André's user avatar
Erik André
  • Member for 5 years, 5 months
  • Last seen more than a month ago
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question
5
The matrix function $\frac{e^x - 1}{x}$ for non-invertible matrices
Nov 13, 2020
question
2
Show that $\int_{\mathbb{T}}f(x) \overline{g(x)} \mathop{dx} = \sum_{n \in \mathbb{Z}} \hat{f}(n) \overline{\hat{g}(n)}$.
Mar 16, 2020
answer
2
Deriving $1-\sum\limits_{k=1}^{n}\frac{2^{k+1}}{3^k}\alpha=1-\alpha(1-(\frac{2}{3})^n)$
Dec 1, 2018
answer
2
Prove $p_1 \iff p_2 \iff p_3 \iff \ldots \iff p_n$ by using Proof by Induction.
Mar 13, 2020
question
1
Showing $\ddot{x} = \frac{\mathrm{d}}{\mathrm{d}x}(\frac{1}{2} \dot{x}^2)$
Jan 7, 2019
question
1
The "Energy transformation" of a second order differential equation
Jan 10, 2019
question
1
Truncation error when applying a finite difference scheme to solve $u_t +Au_x = 0$
May 16, 2019
question
1
Intuition of Reynold's Transport Theorem
Nov 12, 2019
answer
1
Using the Banach fixed point Theorem
Nov 30, 2018
answer
1
Is minimizing the norm of a vector equivalent to minimizing the square of the norm?
Dec 1, 2018