The density of the primitive Pythagorean triples.
45027
number of primitive Pythagorean triangles whose hypotenuses do not exceed n?
129161
The minimum perimeter and maximum height of a triangle under constraints
31318
Cardinality of cartesian square
103552
The minimal polynomial of a primitive $p^{m}$-th root of unity over $\mathbb{Q}_p$
125210
proof: primitive pythagorean triple, a or b has to be divisible by 3
103116
Prove that any odd number can be a leg in a Pythagorean Triple
6121
Quotient ring of Gaussian integers
31990
Is $\{\frac{m}{10^n}\mid m,n\in\mathbb Z,\ n\geq 0\}$ dense in $\mathbb R$?
43659
Why is $\pi$ so close to $3$?
25795
Density of $\mathbb{Q}^n$ in $\mathbb{R}^n$
158582
Prove that $\{\frac{\phi (n)}{n}\}_{n \in \Bbb N}$ is dense in $[0,1]$
6793
A linearly independent set about approximate units
84686
Geometric Description Of a Set In The Complex Plane
40952
Showing that sum of angles of hyperbolic triangle is strictly less than $\pi$
158162
Finding the volume of the tetrahedron.
120912
Can two Pythagorean triples have the same product?
48670
GCD in Gaussian integers.