Question

Why is this counterexample to an established result wrong?

score 73 · Answer 1 · 2018-09-06 01:04:23

73

Views

Why is this counterexample to an established result wrong?

Published on 06 Sep 2018 - 1:04

score 170 · Answer 2 · 2026-03-25 04:55:48

170

Views

Understanding a mistake regarding removable and essential singularity.

Published on 25 Mar 2026 - 4:55

score 751 · Answer 3 · 2018-09-17 14:01:56

751

Views

Proof that 2=1 using differentiation

Published on 17 Sep 2018 - 14:01

score 69 · Answer 4 · 2018-09-21 11:40:51

Let $C$ be compact sets. $\bigcap_{i \in K} (C_i)=\emptyset \Rightarrow \exists F \subseteq K \; \text {finite} | \bigcap_{i \in F} (C_i) = \emptyset$

score 107 · Answer 5 · 2018-09-22 23:00:12

107

Views

Why are cases required in proofs? i.e. in the inequality $|\sqrt{x}-\sqrt{y}| \leq \sqrt{|x-y|}$?

Published on 22 Sep 2018 - 23:00

score 14.4k · Answer 6 · 2026-03-25 01:22:22

14.4k

Views

What is the Todd's function in Atiyah's paper?

Published on 25 Mar 2026 - 1:22

score 45 · Answer 7 · 2018-09-27 22:53:59

45

Views

Wrong intuition with partial derivatives.

Published on 27 Sep 2018 - 22:53

score 930 · Answer 8 · 2018-10-09 16:57:05

930

Views

Where does this derivation of the Fourier Series for csc(x) go wrong?

Published on 09 Oct 2018 - 16:57

score 206 · Answer 9 · 2018-10-10 21:55:37

206

Views

Why does my proof fail to show the logical equivalence of (∀x)(Fx v Gx) ⊢ (∀x)Fx v (∀x)Gx?

Published on 10 Oct 2018 - 21:55

score 105 · Answer 10 · 2018-10-12 10:12:38

105

Views

What's wrong with this induction? (Runtime analysis of standard polynomial long division)

Published on 12 Oct 2018 - 10:12

score 210 · Answer 11 · 2026-03-21 22:12:53

210

Views

Why isn't Legendre's Conjecture resolved by the work done by Nair and Hanson in relation to Least Common Multiples?

Published on 21 Mar 2026 - 22:12

score 988 · Answer 12 · 2018-10-22 14:11:46

988

Views

What is wrong with this fake proof that subgroup of a cyclic group is cyclic?

Published on 22 Oct 2018 - 14:11

score 36 · Answer 13 · 2018-10-23 18:11:22

36

Views

check if inequality is real

Published on 23 Oct 2018 - 18:11

score 128 · Answer 14 · 2018-10-25 01:28:39

128

Views

What went wrong in this fake proof?

Published on 25 Oct 2018 - 1:28

score 1.6k · Answer 15 · 2026-03-25 06:27:46

1.6k

Views

Starting with a false statement, how can one prove anything is true?

Published on 25 Mar 2026 - 6:27

List Question

Why is this counterexample to an established result wrong?

Understanding a mistake regarding removable and essential singularity.

Proof that 2=1 using differentiation

Let $C$ be compact sets. $\bigcap_{i \in K} (C_i)=\emptyset \Rightarrow \exists F \subseteq K \; \text {finite} | \bigcap_{i \in F} (C_i) = \emptyset$

Why are cases required in proofs? i.e. in the inequality $|\sqrt{x}-\sqrt{y}| \leq \sqrt{|x-y|}$?

What is the Todd's function in Atiyah's paper?

Wrong intuition with partial derivatives.

Where does this derivation of the Fourier Series for csc(x) go wrong?

Why does my proof fail to show the logical equivalence of (∀x)(Fx v Gx) ⊢ (∀x)Fx v (∀x)Gx?

What's wrong with this induction? (Runtime analysis of standard polynomial long division)

Why isn't Legendre's Conjecture resolved by the work done by Nair and Hanson in relation to Least Common Multiples?

What is wrong with this fake proof that subgroup of a cyclic group is cyclic?

check if inequality is real

What went wrong in this fake proof?

Starting with a false statement, how can one prove anything is true?

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