Question

"Why" is $[\mathbb{C}:\mathbb{R}] < \infty$?

score 334 · Answer 1 · 2026-04-13 01:37:50

334

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"Why" is $[\mathbb{C}:\mathbb{R}] < \infty$?

Published on 13 Apr 2026 - 1:37

score 2.6k · Answer 2 · 2026-03-27 12:07:57

2.6k

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Solvable and nilpotent groups, normal series and intuition

Published on 27 Mar 2026 - 12:07

score 449 · Answer 3 · 2026-04-03 09:13:52

449

Views

Intuition and Tricks - Hard Overcomplex Proof - Order of Subgroup of Cyclic Subgroup - Fraleigh p. 64 Theorem 6.14

Published on 03 Apr 2026 - 9:13

score 170 · Answer 4 · 2026-04-12 01:31:25

170

Views

Orthornomal matrices

Published on 12 Apr 2026 - 1:31

score 528 · Answer 5 · 2026-04-03 09:14:08

528

Views

Intuition and Tricks - Crafty Short Proof - Generators, Order of a Cyclic Group - Fraleigh p. 64 Theorem 6.14

Published on 03 Apr 2026 - 9:14

score 3.2k · Answer 6 · 2026-04-09 14:43:25

3.2k

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Understanding cross ratio and harmonic conjugates

Published on 09 Apr 2026 - 14:43

score 1.7k · Answer 7 · 2026-04-03 09:14:50

1.7k

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Suppose a unique a generates a cyclic subgroup of order. Show ax = xa. - Fraleigh p. 67 6.50

Published on 03 Apr 2026 - 9:14

score 1.2k · Answer 8 · 2026-04-09 16:48:56

1.2k

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Connection between even/odd and symmetric/skew symmetric

Published on 09 Apr 2026 - 16:48

score 627 · Answer 9 · 2026-04-13 00:27:54

627

Views

Intuition for $\,c\mid a,b \iff c\mid \gcd(a,b)$ and the Bezout GCD identity

Published on 13 Apr 2026 - 0:27

score 265 · Answer 10 · 2014-01-03 09:04:58

265

Views

Proofs involving Disjunctions [Velleman, Chapter 3.5]

Published on 03 Jan 2014 - 9:04

score 609 · Answer 11 · 2014-01-04 06:34:52

609

Views

Why, conceptually, is it that $\binom{n}{r} = \binom{n-1}{r-1} + \binom{n-1}{r}$?

Published on 04 Jan 2014 - 6:34

score 1.4k · Answer 12 · 2026-04-08 17:02:00

1.4k

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Intuition behind power rule?

Published on 08 Apr 2026 - 17:02

score 6.6k · Answer 13 · 2014-01-05 09:07:09

6.6k

Views

Proof - There're infinitely many primes of the form 3k + 2 — origin of $3q_1..q_n + 2$

Published on 05 Jan 2014 - 9:07

score 551 · Answer 14 · 2026-04-09 08:12:23

551

Views

Understanding Integration techniques?

Published on 09 Apr 2026 - 8:12

score 291 · Answer 15 · 2014-01-05 13:26:27

291

Views

Intuition — An integer $n > 1$ is composite $\iff \color{purple}{p \le \sqrt{n}}$ divides it.

Published on 05 Jan 2014 - 13:26

List Question

"Why" is $[\mathbb{C}:\mathbb{R}] < \infty$?

Solvable and nilpotent groups, normal series and intuition

Intuition and Tricks - Hard Overcomplex Proof - Order of Subgroup of Cyclic Subgroup - Fraleigh p. 64 Theorem 6.14

Orthornomal matrices

Intuition and Tricks - Crafty Short Proof - Generators, Order of a Cyclic Group - Fraleigh p. 64 Theorem 6.14

Understanding cross ratio and harmonic conjugates

Suppose a unique a generates a cyclic subgroup of order. Show ax = xa. - Fraleigh p. 67 6.50

Connection between even/odd and symmetric/skew symmetric

Intuition for $\,c\mid a,b \iff c\mid \gcd(a,b)$ and the Bezout GCD identity

Proofs involving Disjunctions [Velleman, Chapter 3.5]

Why, conceptually, is it that $\binom{n}{r} = \binom{n-1}{r-1} + \binom{n-1}{r}$?

Intuition behind power rule?

Proof - There're infinitely many primes of the form 3k + 2 — origin of $3q_1..q_n + 2$

Understanding Integration techniques?

Intuition — An integer $n > 1$ is composite $\iff \color{purple}{p \le \sqrt{n}}$ divides it.

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