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Mathematics
Fred Akalin's user avatar
Fred Akalin's user avatar
Fred Akalin's user avatar
Fred Akalin
  • Member for 8 years, 1 month
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13
Intersection of a line and a curve.
Jun 7, 2017
6
Showing that $\sum_{i = 1}^N \sum_{j = N - i + 1}^N \frac{1}{ij} = \sum_{i = 1}^N \frac{1}{i^2}$ without induction
Jul 1
5
Proving an evenness property for the nth power map for a finite (not necessarily commutative) group $G$
Jan 26, 2020
5
If polynomial $ax^4 +bx^2 +c$ has four real roots?
Jun 8, 2017
5
Let $A$ be an abelian group of order $2^{100}$. Prove that $A$ is not a subgroup of $S_n$ for $n<200$.
Dec 7, 2023
3
Can the Gram-Schmidt algorithm be extended to construct a basis for $T_p M$ of a semi-Riemannian manifold?
Jan 26, 2018
3
Does a coordinate chart have a smooth orthonormal frame w.r.t. a semi-Riemannian metric?
Jan 29, 2018
3
Find exponent of prime $p$ in prime factorization of a number $x$
Jun 7, 2017
3
Reference request: The ring $k[x_1, \dotsc, x_n]/I$ as a limit of functions with distinct zeroes
Feb 3
2
Localizing $\mathbb{Z}[X]/(2X, X^2)$ at $(2, X)$
Dec 14, 2018
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10
Reflect Type.Field() order