Question

What is wrong with this "proof" that there is no $\omega$th inaccessible cardinal?

score 892 · Answer 1 · 2026-03-27 07:14:57

892

Views

What is wrong with this "proof" that there is no $\omega$th inaccessible cardinal?

Published on 27 Mar 2026 - 7:14

score 40 · Answer 2 · 2026-03-27 02:08:25

40

Views

Using Union to prove a context-free language?

Published on 27 Mar 2026 - 2:08

score 188 · Answer 3 · 2015-06-10 13:37:53

188

Views

What's wrong with this deduction using logarithms?

Published on 10 Jun 2015 - 13:37

score 235 · Answer 4 · 2026-03-26 19:18:36

235

Views

P(TT|T) in two coin tosses not 1/3?

Published on 26 Mar 2026 - 19:18

score 3.5k · Answer 5 · 2015-06-15 16:10:25

3.5k

Views

Paradox - minus one equals one using square roots

Published on 15 Jun 2015 - 16:10

score 325 · Answer 6 · 2015-06-20 09:00:50

325

Views

I was wondering, shouldn't the fraction $\frac {-2}{-1}$ be less than 1?

Published on 20 Jun 2015 - 9:00

score 116 · Answer 7 · 2015-06-26 23:01:08

116

Views

Where is the problem here:$-1=(-1)^1=(-1)^\frac{2}{2}=({(-1)}^{2})^{1/2}=\sqrt{1}=1$?

Published on 26 Jun 2015 - 23:01

score 96 · Answer 8 · 2026-03-28 01:06:02

96

Views

Is this mathematical statement?

Published on 28 Mar 2026 - 1:06

score 3.5k · Answer 9 · 2026-03-27 02:33:16

3.5k

Views

Do we really need the constraint qualification?

Published on 27 Mar 2026 - 2:33

score 210 · Answer 10 · 2015-07-02 19:47:14

210

Views

About the computation of the limit $ \lim_{x \to \infty} \frac{1^{99} + 2^{99} + \cdots + x^{99}}{x^{100}} $

Published on 02 Jul 2015 - 19:47

score 862 · Answer 11 · 2015-07-04 18:20:16

862

Views

Is $\sum_{n=1}^\infty a_n\sin(nx)$ converges on $[\varepsilon, 2\pi-\varepsilon]$?

Published on 04 Jul 2015 - 18:20

score 507 · Answer 12 · 2015-07-05 04:49:47

507

Views

How can the ball reach the wall when it always has to travel halfway?

Published on 05 Jul 2015 - 4:49

score 237 · Answer 13 · 2026-03-27 14:39:56

237

Views

Where does this argument showing there are uncountably many TMs fail?

Published on 27 Mar 2026 - 14:39

score 61 · Answer 14 · 2015-07-08 16:41:16

61

Views

Error in proof: Distribution of exponents for negative number

Published on 08 Jul 2015 - 16:41

score 1.7k · Answer 15 · 2015-07-10 15:27:30

1.7k

Views

Was Smullyan really wrong?

Published on 10 Jul 2015 - 15:27

List Question

What is wrong with this "proof" that there is no $\omega$th inaccessible cardinal?

Using Union to prove a context-free language?

What's wrong with this deduction using logarithms?

P(TT|T) in two coin tosses not 1/3?

Paradox - minus one equals one using square roots

I was wondering, shouldn't the fraction $\frac {-2}{-1}$ be less than 1?

Where is the problem here:$-1=(-1)^1=(-1)^\frac{2}{2}=({(-1)}^{2})^{1/2}=\sqrt{1}=1$?

Is this mathematical statement?

Do we really need the constraint qualification?

About the computation of the limit $ \lim_{x \to \infty} \frac{1^{99} + 2^{99} + \cdots + x^{99}}{x^{100}} $

Is $\sum_{n=1}^\infty a_n\sin(nx)$ converges on $[\varepsilon, 2\pi-\varepsilon]$?

How can the ball reach the wall when it always has to travel halfway?

Where does this argument showing there are uncountably many TMs fail?

Error in proof: Distribution of exponents for negative number

Was Smullyan really wrong?

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