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May
14
answered Mathematical Induction - Graph Theory
May
14
comment Theoretical way to prove no positive integer $n$ exists such that $n+3$ and $n^2+3n+3$ are both perfect cubes.
Oh yes, good eye! Thank you kindly.
May
14
revised Theoretical way to prove no positive integer $n$ exists such that $n+3$ and $n^2+3n+3$ are both perfect cubes.
edited body
May
14
answered normal subgroup in $S_3$?
May
14
asked Theoretical way to prove no positive integer $n$ exists such that $n+3$ and $n^2+3n+3$ are both perfect cubes.
May
13
revised Prove that $(\mathbb{R^+} \times \mathbb{R^+}, \oplus)$ is a commutative group, where $(a,b) \oplus (c,d) = (ac, bd)$
deleted 2 characters in body
May
13
accepted Cute convergence problem. Proving convergence of sequence regarding reciprocals of least common multiple converges.
May
13
comment Two lines intersect forming four angles
when is an angle too straight?
May
13
answered Pigeonhole principle, maximum numbers taken
May
12
awarded  Good Answer
May
8
revised Mathematical structures with name reffering to a country
added 11 characters in body
May
8
comment Diophantine eqution with odd prime
We used algebraic number theory. We looked at the equation in $\mathbb Q (\sqrt {-2}) \cap A$
May
8
asked Mathematical structures with name reffering to a country
May
8
comment Diophantine eqution with odd prime
I just learned how to solve it when $p$ is $3$ this week. I don't think it is easy in general.
May
8
comment Distribution of composite numbers
And by the looks of it anyone who reads this is going to gain a lot.
May
8
comment Distribution of composite numbers
No pain no gain.
May
8
comment Why is the open interval $(0, 1)$ a Polish space?
Are countries starting to claim territory in the real number line now too? This is preposterous !
May
8
answered How long will it take for one of them or both of them?
May
7
awarded  Enlightened
May
7
awarded  Nice Answer