# Oliver E. Anderson

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 10 What was the first bit of mathematics that made you realize that math is beautiful? (For children's book) 10 Show that the sequence $\sqrt{2},\sqrt{2\sqrt{2}},\sqrt{2\sqrt{2\sqrt{2}}},…$ converges and find its limit. 8 Companion Lecture Notes to Atiyah-MacDonald? 3 If $R$ is an infinite ring, then $R$ has either infinitely many zero divisors, or no zero divisors 3 If $G$ is abelian and if $N$ is a subgroup of $G$ prove that $G/N$ is abelian.

# 980 Reputation

 +10 Show that the sequence $\sqrt{2},\sqrt{2\sqrt{2}},\sqrt{2\sqrt{2\sqrt{2}}},…$ converges and find its limit. +10 Let $A$ be a ring. Let $I$, $J$ be two ideals of $A$.The following properties are ture. +5 Hartshorne Lemma(II 6.1) +10 Group of order 9 is simple

# 6 Questions

 14 Bijection between power sets of sets implies bijection between sets? 5 Exercise 4.5.E a) in Ravi Vakil's Foundations of Algebraic Geometry. 4 Hartshorne Lemma(II 6.1) 2 How to prove that the following morphism is surjective? 1 Prove that a projective change of coordinates is an isomorphism

# 39 Tags

 11 real-analysis × 4 7 elementary-set-theory × 3 8 commutative-algebra × 4 6 linear-algebra × 5 8 reference-request × 2 6 group-theory × 3 7 measure-theory × 4 5 general-topology × 3 7 abstract-algebra × 3 4 algebraic-geometry × 7

# 2 Accounts

 Mathematics 980 rep 213 MathOverflow 101 rep 1