user10676

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2,240 reputation

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37 Answers

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37	Why can't you flatten a sphere?
8	Why does the ideal $(a+bi)$ have index $a^2+b^2$ in $\mathbb{Z}[i]$?
5	What test can be used to show $\sum \dfrac{n!}{n^n}$ converges?
5	Question about topology on $K^\times$ in local CFT
5	Commutation when minimal and characteristic polynomial agree

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2,240 Reputation

+45	What are the ring morphisms $\mathbb{Q}[[X]]\to R$ for a ring $R$?
+35	Sum of kth roots ($\sum\sqrt[k]{m}$)
+335	Finding the Galois group of $X^8-2$ over Q.
+15	Hartshorne Ex. 1.3.8 - Where do I take intersections here?

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27 Questions

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13	Multiplicative norm on $\mathbb{R}[X]$.
13	Why is $\mathbb{C}_p$ isomorphic to $\mathbb{C}$?
8	Exercise on representations
7	What is the operation $\boxtimes$?
7	What is the discriminant of a quadratic extension over a number field?

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58 Tags

41 general-topology × 4	8 modules
20 abstract-algebra × 8	7 linear-algebra × 6
9 homework × 3	7 matrices × 3
9 sequences-and-series × 3	7 soft-question × 2
8 number-theory × 9	6 real-analysis × 7

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1 Account

$Mathematics Stack Exchange$

Mathematics

2,240 rep

2416

19 Badges

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Fanatic	Mortarboard
Yearling × 2	Good Answer
Caucus × 2	Nice Answer
Populist	Cleanup
Citizen Patrol	Nice Question × 2

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