Question

Why is this counterexample to an established result wrong?

score 76 · Answer 1 · 2026-04-14 14:06:21

76

Views

Why is this counterexample to an established result wrong?

Published on 14 Apr 2026 - 14:06

score 173 · Answer 2 · 2026-05-10 19:49:54

173

Views

Understanding a mistake regarding removable and essential singularity.

Published on 10 May 2026 - 19:49

score 755 · Answer 3 · 2026-04-14 05:15:45

755

Views

Proof that 2=1 using differentiation

Published on 14 Apr 2026 - 5:15

score 72 · Answer 4 · 2026-04-15 05:35:56

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 110 · Answer 5 · 2026-04-15 15:40:23

110

Views

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

Published on 15 Apr 2026 - 15:40

score 14.4k · Answer 6 · 2026-05-10 14:59:43

14.4k

Views

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

Published on 10 May 2026 - 14:59

score 48 · Answer 7 · 2026-04-10 02:34:29

48

Views

Wrong intuition with partial derivatives.

Published on 10 Apr 2026 - 2:34

score 933 · Answer 8 · 2026-04-16 12:29:15

933

Views

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

Published on 16 Apr 2026 - 12:29

score 208 · Answer 9 · 2026-04-11 22:34:41

208

Views

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

Published on 11 Apr 2026 - 22:34

score 108 · Answer 10 · 2026-04-14 08:18:19

108

Views

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

Published on 14 Apr 2026 - 8:18

score 211 · Answer 11 · 2026-04-09 07:33:44

211

Views

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

Published on 09 Apr 2026 - 7:33

score 991 · Answer 12 · 2026-04-12 08:42:53

991

Views

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

Published on 12 Apr 2026 - 8:42

score 40 · Answer 13 · 2026-04-12 19:32:36

40

Views

check if inequality is real

Published on 12 Apr 2026 - 19:32

score 131 · Answer 14 · 2026-04-10 19:01:50

131

Views

What went wrong in this fake proof?

Published on 10 Apr 2026 - 19:01

score 1.6k · Answer 15 · 2026-03-31 04:42:15

1.6k

Views

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

Published on 31 Mar 2026 - 4:42

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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