# NumberFour

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bio website location Prague, Czech Republic age member for 3 years, 6 months seen Dec 8 at 14:44 profile views 51

I am a math student from Prague, Czech Republic

# 27 Questions

 5 Group structure of an elliptic curve 3 Eigenvectors of inverse complex matrix 3 Find primitive element of splitting field of $1 + x + x^2 - x^5$ 3 Find extension of $\mathbb{Q}$ containing components of eigenvectors of a matrix 3 Proof that $n+1$ divides $\sum_{k=1}^n k^q$ for $q > 0$

# 443 Reputation

 +5 Group structure of an elliptic curve +10 Eigenvectors of inverse complex matrix +25 Let $R$ be a UFD and $p,q,r \in R$. $pq=r^3$ and $\gcd(p,q)=1$ then $p,q$ are cubes up to associates. +5 Proving that if $n\times n$ Hadamard matrix exists, then 4 divides $n$

 2 Derivative of multivariable function 1 Let $R$ be a UFD and $p,q,r \in R$. $pq=r^3$ and $\gcd(p,q)=1$ then $p,q$ are cubes up to associates. 1 How much randomness is in human-generated random digit string? 0 Proof for maths induction 0 Getting a basis of eigenvalues

# 51 Tags

 2 multivariable-calculus × 3 1 random 2 analysis × 3 0 linear-algebra × 8 1 abstract-algebra × 5 0 matrices × 4 1 unique-factorization-dom 0 eigenvalues-eigenvectors × 4 1 ring-theory 0 convergence × 3

# 12 Accounts

 Stack Overflow 915 rep 11332 Mathematics 443 rep 214 Server Fault 159 rep 212 TeX - LaTeX 143 rep 4 Cryptography 138 rep 4