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16h
revised What is this procedure called for angle radians?
added 48 characters in body
16h
answered What is this procedure called for angle radians?
16h
comment Why is the gap between consecutive twin primes always a number of integers divisible by 3?
@vadim123 you should post this as an answer
1d
comment What is a cluster point of this sequence?
Every point is a cluster point because it follows from density that every open interval contains infinitely many points of the sequence. A proof of density can be found here: math.stackexchange.com/questions/272545/…
1d
comment Can a Prime Ideal be equal to the parent Ring?
If my answer satisfies your question, you should consider accepting it
1d
answered What is a cluster point of this sequence?
1d
comment integration of $1/x$ a counterexample to the rule
@NoahSchweber Indeed it does. It's a matter of picking your battles, and personally I think the most reasonable thing to do is define the logarithm by this integral.
1d
comment Help understanding theorem proof
@HiPolyEraser $\frac{1}{y-x}$ is a number that the author picks because it makes clever things happen. It's a real number whose existence is justified by the fact that $x\neq y$, it's not the result of a theorem.
1d
answered integration of $1/x$ a counterexample to the rule
1d
reviewed Edit What are the common solutions of $x^2+y=31$ and $y^2+x=41$?
1d
revised What are the common solutions of $x^2+y=31$ and $y^2+x=41$?
deleted 243 characters in body
1d
reviewed Looks OK Can any smooth function be written in this form?
1d
reviewed Approve How is the following subgroup is of finite index?
1d
reviewed No Action Needed why is the derivative of a number 0 while the derivative of $x$ is 1?
1d
reviewed Close What $+1+1+\cdots$ really equals
1d
reviewed Leave Open How to compute homography matrix H from four corresponding points
1d
reviewed Leave Open Reduction modulo $p$ of $x^4 + 3x^3 -21x^2 -62x -40$ with a multiple root
1d
reviewed Leave Open Extension and contraction of ideals in polynomial rings
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reviewed Leave Open Expressing $z\in G$ as $z=gh^2$ where $g$ is a $2$-element and $|h|$ is odd
1d
reviewed Close The next number in the series?