Recent content by barbiemathgurl

let E be an algebraic over F where F is perfect. Show that E is perfect. :rolleyes:

Let k be a positive integer. define G_k = {x| 1<= x <= k with gcd(x,k)=1} prove that: a)G_k is a group under multiplication modulos k (i can do that). b)G_nm = G_n x G_m be defining an isomorphism.

i got this problem which is killin me :-p given a set {1,2,...,2n} choose any (n+1) element subset, show there exists an element which divides another element.

can someone please simplify? \sin \frac{\pi}{n} \sin \frac{2\pi}{n} ... \sin \frac{(n-1)\pi}{n}

given a field F and two algebraic closures of F, are those two the isomorphic? and why doesn't this show that C and A (algebraic numbers) arent isomorphic?

so embarrased askin so much :redface: On a table there are 14 cards. On each card there is a number between 1 to 1000. Show it is possible to divide the cards into two piles so that the total sums are the same.

can somebody prove that for all a,b,c>0: a/(b+c) + b/(a+c) + c/(a+b) >= 3/2

let alpha be algebraic over F of degree n, show that there exists at most n isomorphisms mapping F(alpha) onto a subfield of bar F (this means the algebraic closure). thanx

im so embarrased askin so much :blushing: show that given 5 distinct lattice points in the plane (points with integer coordinates) there exists a line segment between both of them containing another lattice point on its interior.

i just can't figure this out. given a n x n matrix (with n>1) "A" such that all entries are integers and A is invertible such that A^{-1} also has integer entries. Let B be another matrix with integer coefficients so that: A+B, A+2B, A+3B, ... A+(n^2)B Are all invertible with integer...

help me its so hard working in the finite field Z_p show that the all the factors of polynomial x^{p^n}-x have degree "d" such that d|n. thanx