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1d
answered Intuitive/direct proof that a rectangle partitioned into rectangles each with at least one integer side must itself have an integer side
1d
answered A polynomial identity
2d
answered What's the value of $n+\cfrac{n}{n+\cfrac{n}{n+\cfrac{n}{\vdots}}}$ for $n\in\mathbb{C}$?
Apr
16
revised Where is the error in finding the particular solution to this recurrence relation?
added 52 characters in body
Apr
16
answered Where is the error in finding the particular solution to this recurrence relation?
Apr
16
comment Characterizing the Galois group using permutations of roots
are $r_1,\ldots,r_n$ indeterminates, or are they the roots ?
Apr
15
comment To compute $\tan1-\tan3+\tan5-\cdots+\tan89$, $\tan1+\tan3+\tan5+\cdots+\tan89$
@YiyuanLee : that's not possible because $S_2 > \tan 89 = 1/\tan 1 \approx 180/\pi >> 97/2\pi$
Apr
14
answered My professor says that this equation in a finite field has a solution but I don't think it does.
Apr
10
comment what is the minimal polynomial of $\alpha=\rho+\rho^4+\rho^{16}$ , $\rho^{21}=1$?
@NirAgami : they are the sum of $6$ roots of unity, each of which has absolute value $1$
Apr
9
answered what is the minimal polynomial of $\alpha=\rho+\rho^4+\rho^{16}$ , $\rho^{21}=1$?
Apr
6
comment Fermat Curve example and questions from coding theory.
how can you not answer the same thing to questions 2-3-4 ? the curve has obvious automorphisms switching between the x,y,z coordinates.
Apr
6
revised The group structure of elliptic curve over $\mathbb F_p$
edited body
Apr
6
revised The group structure of elliptic curve over $\mathbb F_p$
added 402 characters in body
Apr
6
answered The group structure of elliptic curve over $\mathbb F_p$
Mar
31
answered Constructing expressions
Mar
29
revised Ordering the solutions to Pell's Equation
added 176 characters in body
Mar
29
answered Ordering the solutions to Pell's Equation
Mar
29
answered Compute the square root of a complex number
Mar
27
answered No primitive root modulo $2^n$ for $n\ge 3$
Mar
26
answered irreducible polynomial over $Q(t_5)$