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Mathematics
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Lukas's user avatar
Lukas's user avatar
Lukas
  • Member for 5 years, 5 months
  • Last seen this week
  • Germany
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About

German PhD student in Mathematics trying to help others and learn interesting things about mathematics.

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17
Wrong but fun and/or useful "proofs" in linear algebra
Apr 16, 2023
14
Alternative proof of the Riesz Representation Theorem
yesterday
5
How to show that $ M_n(\mathbb{R}) \cong \mathbb{R}^{n^2}?$
Apr 2, 2021
5
Connection between finiteness of dimension of a vector space and existence of a polynomial, such that P(T) is a zero map.
Nov 22, 2021
4
Examples of *uncountable* null and meagre sets that are not rare
Sep 4, 2024
4
Divergence of $\big(\frac{5k^2}{k+1}\big)^k\cdot\frac{1}{5(k+1)}$ to $\infty$
Apr 19, 2024
4
Ricci Curvature under uniform scaling
May 4, 2023
4
Eigenvalue of self-adjoint
Dec 19, 2021
4
How to prove this equality with rotation matrix
Dec 2, 2021
3
How to see that the Jacobian is a map between tangent spaces?
Nov 5, 2025