JSchlather

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31748
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age 23
visits member for 2 years, 8 months
seen 3 hours ago
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I'm taking a leave from mathematics for the foreseeable future.


224 Answers

newest activity votes
56
Can you answer my son's fourth-grade homework question: Which numbers are prime, have digits adding to ten and have a three in the tens place?
34
Paul Erdos's Two-Line Functional Analysis Proof
14
Non-associative, non-commutative binary operation with a identity
13
Compute $\operatorname{Hom}_{\mathbb{Z}} ( \mathbb{Q}, \mathbb{Z})$
10
What would happen if we created a vector space over an integral domain/ring.
10
$[L:K]=n!\ \Longrightarrow \ f$ is irreducible and $\text{Gal}(L/K)\cong S_n.$
9
Irreducibility of $X^n - 2$ over $\mathbf Z[i]$.
9
Showing that that the torus is not a retract of a $3$-sphere
9
Is there any number greater than 8 of the form $2^{2k+1}$ which is the sum of a prime and a safe prime?
8
What is the current status of Vinay Deolalikar's proof that P is not equal to NP
8
Prove that a group with exactly two proper nontrivial subgroups is isomorphic to $\mathbb{Z}_{pq}$ or $\mathbb{Z}_{p^3}$.
8
How to show that a finite comutative ring without zero divisors is a field?
8
Computing the minimal polynomial over $\mathbb{Q}(\sqrt{3})$
8
Integral domain of prime characteristic
8
Show that for a finite metric space A, every subset is open
8
Finite sub cover for $(0,1)$
7
Are functions that map dense sets to dense sets continuous?
7
Proof of $S \subset \mathbb{R}$, $ \inf(S)\leq \sup(S)$
7
Involutions and Abelian Groups, II.
7
A counterexample on the existence of some sequence in Hilbert space
7
Please prove that ${n\choose r} < (n+1)^r$. My induction-based proof is ugly!
7
Prove that $f$ is identically equal to $0$ on a closed interval
7
Normal subgroup of prime index
7
Can we always find a primitive element that is a square?
7
How to prove that $\mathbb{Q} \subset \mathbb{R}$ is not locally compact directly?
7
Finding 2^2^2^2^2 … n times
6
to show $X$ is disconnected
6
Finding the degree of a field extension over the rationals
6
Is $\mathbb{Z}^2$ cyclic?
6
Calculate $\mathrm{Gal}(\mathbb{Q}(\sqrt[5]{3})/\mathbb{Q})$
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