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1d
revised Image of the set $\{z \in \mathbb{C}:|z|>r\}$ by the complex exponential function
added a coupla backslashes to make sine and cosine look right.
Apr
30
revised Splitting field of an irreducible polynomial of degree four
Yet further explanation.
Apr
28
revised Expand the Laurent series
I’ve told OP that the book answer is not right.
Apr
26
revised Find $\theta \neq \sqrt{3}+\sqrt{5}$ such that $\mathbb{Q}(\theta) = \mathbb{Q}(\sqrt{3},\sqrt{5})$. Need a hint to get started.
typo again
Apr
26
revised Splitting field of an irreducible polynomial of degree four
typo
Apr
26
revised Splitting field of an irreducible polynomial of degree four
OP asked for an expansion and explanation.
Apr
14
revised Please express the first 3 7-adic digits of a root of $x^3-1$ in $\mathbb{Z}_7$ other than 1.
deleted 1 character in body
Apr
2
revised There is no proper subgroup of $\mathbb Q$ of finite index
began an upTeXing
Apr
2
revised Solve for $y$ in terms of $x$ at $z=0$
Just made it into TeX
Mar
16
revised Basis of $\mathbb Q (3^{1/3}, \xi )$
Extensive addition to answer a question from OP in the comments.
Mar
16
revised homomorphism from ZxZ to Q
changed my answer to more fully answer OP’s question.
Mar
14
revised Is $\mathbb{Q}(\sqrt[5]{7}),i)$ the splitting field for some polynomial in $\mathbb Q[x]$?
At OP’s request, i have explained what a normal extension is.
Mar
6
revised $5$-adic expansion of $−2$
added 206 characters in body
Mar
4
revised Constructing Finite Field Tables
spelling errors
Feb
27
revised Prove that a $p$-adic integer $x$ is divisible by $p^n$ if and only if $x_n = 0$
“amplification” as requested by OP
Feb
25
revised Invertible elements of a quotient ring of $ℝ[x]$.
typo
Feb
19
revised Find the minimal polynomial of $\sqrt2 + \sqrt3 $ over $\mathbb Q$
typo
Jan
31
revised Put $A\cos(x) + B\sin(x)$ into form : $A\sin(x+ \theta)$
edited body
Jan
29
revised Find roots or splitting field of a polynomial given its Galois group
left out asquare root!
Jan
18
revised Find the angle between planes given three lines
give proper credit to a commenter