Question

Can there be a manifold with uncountable genus? Can they be compact?

score 307 · Answer 1 · 2026-04-14 00:34:22

307

Views

Can there be a manifold with uncountable genus? Can they be compact?

Published on 14 Apr 2026 - 0:34

score 716 · Answer 2 · 2026-05-10 17:17:35

716

Views

Explain the odd/even inequality in the heights of numbers under the Collatz $(3x+1)/2$ transformation?

Published on 10 May 2026 - 17:17

score 48 · Answer 3 · 2026-04-12 08:09:44

48

Views

How can I find a finite closed form for $\phi (\lambda)$?

Published on 12 Apr 2026 - 8:09

score 138 · Answer 4 · 2026-04-12 22:33:15

138

Views

Can the "symmetric algebra" over $\mathbb R^n$ be defined from an infinite-dimensional exterior algebra?

Published on 12 Apr 2026 - 22:33

score 179 · Answer 5 · 2026-04-08 20:44:02

179

Views

Can $\mathbb R$ be written as $(-\infty , \infty)$?

Published on 08 Apr 2026 - 20:44

score 566 · Answer 6 · 2026-05-10 17:01:41

566

Views

For what values of $a$ and $b$ does $\lim_{x\rightarrow \infty}(\sqrt{x^2+x+1}-ax-b)=1$?

Published on 10 May 2026 - 17:01

score 67 · Answer 7 · 2026-04-14 08:31:18

67

Views

Determining whether elements map to $\aleph_0$

Published on 14 Apr 2026 - 8:31

score 97 · Answer 8 · 2026-04-10 22:47:00

97

Views

Infinite size is actually number density?

Published on 10 Apr 2026 - 22:47

score 99 · Answer 9 · 2026-04-14 02:02:32

99

Views

How to mathematically/logically prove that everything in our "real" world is finite?

Published on 14 Apr 2026 - 2:02

score 932 · Answer 10 · 2026-04-12 21:10:14

932

Views

If $f:A\rightarrow A$ is injective but not surjective then $A$ is infinite.

Published on 12 Apr 2026 - 21:10

score 95 · Answer 11 · 2026-04-14 05:04:46

95

Views

How can i put a log inside an infinite sum?

Published on 14 Apr 2026 - 5:04

score 2.5k · Answer 12 · 2026-05-11 01:11:28

2.5k

Views

F distribution with the denominator degrees of freedom infinitely large

Published on 11 May 2026 - 1:11

score 37 · Answer 13 · 2026-04-16 00:01:58

37

Views

How can we prove $\sum\limits_{k=0}^{\infty}(m+k+1)^nx^k=\sum\limits_{q=0}^{n}\binom{n}{q}m^{n-q}\frac{A_{q}(x)}{(1-x)^{q+1}}$?

Published on 16 Apr 2026 - 0:01

score 76 · Answer 14 · 2026-04-13 06:32:06

76

Views

what does it mean ' infinity comes in different sizes'?

Published on 13 Apr 2026 - 6:32

score 64 · Answer 15 · 2026-05-10 16:12:03

64

Views

Finding sum of a geometric series

Published on 10 May 2026 - 16:12

List Question

Can there be a manifold with uncountable genus? Can they be compact?

Explain the odd/even inequality in the heights of numbers under the Collatz $(3x+1)/2$ transformation?

How can I find a finite closed form for $\phi (\lambda)$?

Can the "symmetric algebra" over $\mathbb R^n$ be defined from an infinite-dimensional exterior algebra?

Can $\mathbb R$ be written as $(-\infty , \infty)$?

For what values of $a$ and $b$ does $\lim_{x\rightarrow \infty}(\sqrt{x^2+x+1}-ax-b)=1$?

Determining whether elements map to $\aleph_0$

Infinite size is actually number density?

How to mathematically/logically prove that everything in our "real" world is finite?

If $f:A\rightarrow A$ is injective but not surjective then $A$ is infinite.

How can i put a log inside an infinite sum?

F distribution with the denominator degrees of freedom infinitely large

How can we prove $\sum\limits_{k=0}^{\infty}(m+k+1)^nx^k=\sum\limits_{q=0}^{n}\binom{n}{q}m^{n-q}\frac{A_{q}(x)}{(1-x)^{q+1}}$?

what does it mean ' infinity comes in different sizes'?

Finding sum of a geometric series

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