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39 Questions

Views Newest Activity Votes

votes

answers

views

Countability of set of positive reals with bounded sum for all finite subsets

real-analysis

Apr 2 '16 at 0:39 André Nicolas 463k

votes

answer

911

views

Intersection of field extensions

abstract-algebra field-theory

Mar 27 '16 at 4:35 Tsemo Aristide 68.2k

votes

answer

views

Integer multiplication vs. “multiple” notation in abstract algebra

abstract-algebra notation

Mar 26 '16 at 21:29 J W 2,218

votes

answers

views

Writing complex numbers in form $a+bi$

complex-numbers

Mar 15 '16 at 14:07 Mark Viola 138k

votes

answers

523

views

Understanding a proof of Schröder-Bernstein theorem

real-analysis

Sep 20 at 6:47 Johannes Z 205

votes

answers

views

Prove operator has eigenvalue with fundamental theorem of algebra

linear-algebra

Aug 28 at 17:48 glS 2,137

votes

answers

419

views

Uncountable intersection of uncountable sets

real-analysis

May 10 at 20:24 Community♦ 1

votes

answers

131

views

Efficient way to rigorously learn AI prerequisites

reference-request self-learning numerical-linear-algebra advice

Jul 25 '16 at 20:27 Omnomnomnom 140k

votes

answer

543

views

Proof of Cauchy Condensation Test using contrapositive

real-analysis

Apr 11 '16 at 1:06 rorty 929

votes

answers

873

views

Finding injection from $[0,1]$ to $P(\mathbb{N})$

real-analysis

Apr 4 '16 at 22:09 rorty 929

votes

answer

793

views

Use Cut Property to prove Axiom of Completeness

real-analysis

Mar 31 '16 at 5:04 Athar Abdul-Quader 827

votes

answer

156

views

Proving additivity of determinant in each argument

linear-algebra determinant

Oct 31 '15 at 1:24 darij grinberg 13.8k

votes

answers

474

views

Finding basis of $\mathbb{Q}(\sqrt{2},\sqrt{3},\sqrt{5})$ over $\mathbb{Q}$

abstract-algebra field-theory extension-field

Mar 24 '18 at 18:39 cactus314 21.6k

votes

answer

views

Direct proof of Bolzano-Weierstrass using Axiom of Completeness

real-analysis

Jul 23 '16 at 16:34 Tuoyu.Z 31

votes

answers

470

views

Show $f''(0)=0$ if $f(x_n)=0$ for $x_n \to 0$

real-analysis

May 28 '16 at 23:38 user190080 3,491

votes

answer

254

views

Inverse function on closed interval is continuous

real-analysis

May 25 '16 at 7:14 3x89g2 6,625

votes

answers

166

views

Is it acceptable to use “But” in a proof that doesn't use contradiction?

proof-writing terminology article-writing publishing

Apr 13 '16 at 1:46 rorty 929

votes

answer

437

views

Prove recursively defined sequence converges

real-analysis

Apr 9 '16 at 2:15 Doug M 47.7k

votes

answers

333

views

Can unbounded sequence minus convergent sequence be bounded?

real-analysis analysis

Apr 7 '16 at 22:20 rorty 929

votes

answer

views

Example of closed intervals that are disjoint only at infinity

real-analysis

Apr 1 '16 at 0:00 Alex S 18.8k

votes

answers

views

Why does $F(\sqrt{a+b+2\sqrt{ab}}) = F(\sqrt{a},\sqrt{b})$?

abstract-algebra field-theory

Mar 26 '16 at 20:44 Community♦ 1

votes

answer

107

views

Irreducibility over field extension $\mathbb{Q}(\sqrt[3]{2})$

abstract-algebra field-theory

Mar 25 '16 at 1:22 Tsemo Aristide 68.2k

votes

answers

views

Find the minimum polynomial of $\sqrt{i+\sqrt{2}}$ over $ \mathbb{R}$

abstract-algebra irreducible-polynomials

Mar 17 '16 at 22:37 Alex Wertheim 16.8k

vote

answers

views

Are arbitrary finite subsets of $\mathbb{N}$ sets?

real-analysis set-theory

May 3 at 20:39 rorty 929

vote

answers

views

Mapping to $\mathbb{Z}_n$ and using Fermat to determine irreducibility of a polynomial over $\mathbb{Q}$

abstract-algebra polynomials irreducible-polynomials

Aug 8 '16 at 13:40 user26857 40.6k

vote

answers

251

views

Generalized Mean Value Theorem: parametric equation interpretation

real-analysis

May 29 '16 at 1:04 Community♦ 1

vote

answers

977

views

Proving recursive sequence converges to $\sqrt{2}$ [duplicate]

real-analysis sequences-and-series analysis convergence-divergence

Apr 9 '16 at 6:23 rorty 929

vote

answer

381

views

Divergent sequence with convergent Cesaro means

real-analysis analysis

Apr 8 '16 at 1:04 mathguy 6,319

vote

answers

130

views

Density of $\mathbb{Q}$ in $\mathbb{R}$ proof technicality

real-analysis

Mar 31 '16 at 20:03 Patrick Stevens 29.9k

vote

answer

562

views

Extension of $\mathbb{Q}$ over which $\pi$ is algebraic of degree 3?

abstract-algebra field-theory

Mar 26 '16 at 3:51 Eric Wofsey 222k

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39 Questions

Countability of set of positive reals with bounded sum for all finite subsets

Intersection of field extensions

Integer multiplication vs. “multiple” notation in abstract algebra

Writing complex numbers in form $a+bi$

Understanding a proof of Schröder-Bernstein theorem

Prove operator has eigenvalue with fundamental theorem of algebra

Uncountable intersection of uncountable sets

Efficient way to rigorously learn AI prerequisites

Proof of Cauchy Condensation Test using contrapositive

Finding injection from $[0,1]$ to $P(\mathbb{N})$

Use Cut Property to prove Axiom of Completeness

Proving additivity of determinant in each argument

Finding basis of $\mathbb{Q}(\sqrt{2},\sqrt{3},\sqrt{5})$ over $\mathbb{Q}$

Direct proof of Bolzano-Weierstrass using Axiom of Completeness

Show $f''(0)=0$ if $f(x_n)=0$ for $x_n \to 0$

Inverse function on closed interval is continuous

Is it acceptable to use “But” in a proof that doesn't use contradiction?

Prove recursively defined sequence converges

Can unbounded sequence minus convergent sequence be bounded?

Example of closed intervals that are disjoint only at infinity

Why does $F(\sqrt{a+b+2\sqrt{ab}}) = F(\sqrt{a},\sqrt{b})$?

Irreducibility over field extension $\mathbb{Q}(\sqrt[3]{2})$

Find the minimum polynomial of $\sqrt{i+\sqrt{2}}$ over $ \mathbb{R}$

Are arbitrary finite subsets of $\mathbb{N}$ sets?

Mapping to $\mathbb{Z}_n$ and using Fermat to determine irreducibility of a polynomial over $\mathbb{Q}$

Generalized Mean Value Theorem: parametric equation interpretation

Proving recursive sequence converges to $\sqrt{2}$ [duplicate]

Divergent sequence with convergent Cesaro means

Density of $\mathbb{Q}$ in $\mathbb{R}$ proof technicality

Extension of $\mathbb{Q}$ over which $\pi$ is algebraic of degree 3?