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Jul
22
revised Problem on Galois theory and irreducible polynomial
changed a low dot (period) to a \cdot, as explained by OP
Jul
22
revised Problem on Galois theory and irreducible polynomial
Changed plain Q to blackboard bold, and replaced the word “annulus” with the word “ring”
Jul
20
revised Existence of $\sqrt{-1}$ in $5$-adics, show resulting sum is convergent.
corrected an embarrassing typo
Jul
4
revised Is it true that group of real numbers under addition isomorphic to group of complex numbers under addition
expansion
Jun
26
revised Non real complex in metric completions of $\mathbb Q$
added 21 characters in body
May
24
revised Finding the fixed Field of $\sigma \in Aut(\mathbb{R}(t)/\mathbb{R})$
corrected a typo
May
20
revised Constructing a Fractional Linear Map
added 118 characters in body
May
15
revised A extending the p-adic valuation to a quadratic extension of $\mathbb{Q}_p$
I gave a full proof, and then realized that OP was asking only for a hint.
May
14
revised Question in Algebraic closed field
Greatly expanded and elaborated my explanation, at OP’s request.
May
5
revised Solving $x^x \equiv x \pmod{17}$.
recover from a foolish arithmetic error
Apr
8
revised Problem on a square group
stuck in a pair of parentheses for clarity
Apr
2
revised Show that K is a splitting field for some degree 4 polynomial f(x) in k[x].
Just added a bunch of dollar signs, to make it proper TeX.
Mar
5
revised A question about the additive group of the $p$-adic integers
Complete rewrite.
Mar
4
revised Prove that volume of a sphere with radius $r$ is $V=\frac43r^3\pi$
gave up my partial answer in favor of the more complete answer of KittyL, and offered an alternative.
Feb
8
revised Factoring polynomial in prime field
correcteed an unaccountable careless error
Jan
19
revised If $x^2+x+1=0 $, then find the value of $(x^3+1/x^3)^3$?
corrected an embarrassing and misleading typo
Jan
19
revised Laurent series for $\frac1{z^2+1}$
There was a topo in the numerator of the outside factor of the last sum. I’ve cofrrected it. —Lubin
Jan
16
revised Is $\sqrt[3]{5}$ in $\mathbb Q(\sqrt[3]{2})$?
Gave alternative argument, by factoring 5.
Jan
13
revised Find the point on the curve farthest from the line $x-y=0$.
added 1 character in body
Jan
11
revised How many elements does $\mathbb Z_7[i]/\langle i+1\rangle$ have?
added 28 characters in body