# xD13G0x

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bio website location Santa Cruz, Bolivia age 21 member for 2 years, 10 months seen 16 hours ago profile views 58

# 13 Questions

 13 Roots with equal fractional parts 10 If $\dfrac{4x^2-1}{4x^2-y^2}$ is an integer, then it is $1$ 8 A problem about a sequence and prime factorization 6 Solve $x^2+4=y^d$ in integers with $d\ge 3$ 5 $x^p+y^p$ is a primitive root modulo $p^2$

# 608 Reputation

 +10 proof that the lebesgue measure of a subspace of lower dimension is 0. +30 Is {0} a free module? +10 Let $x$ and $y$ be positive integers such that $xy \mid x^2+y^2+1$. +5 About some notation of the derivative

 17 Prove that $n^{2003}+n+1$ is composite for every $n\in \mathbb{N} \backslash\{1\}$ 10 Let $x$ and $y$ be positive integers such that $xy \mid x^2+y^2+1$. 3 Is {0} a free module? 1 How can I make the following 2 fractions integers? 0 Cool/Useful Examples of Characteristic and Minimal Polynomials?

# 23 Tags

 17 elementary-number-theory × 5 1 diophantine-equations × 3 17 contest-math 1 combinatorics 11 number-theory × 5 0 lebesgue-measure × 2 3 abstract-algebra × 2 0 calculus × 2 3 modules 0 polynomials × 2

# 5 Accounts

 Mathematics 608 rep 317 Mathematica 364 rep 111 TeX - LaTeX 225 rep 27 Ask Different 101 rep Stack Overflow 91 rep 14