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What is the difference between an infinite set of 1 dollar bills and an infinite set of 20 dollar bills?

score 1k · Answer 1 · 2026-04-13 20:19:29

1k

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What is the difference between an infinite set of 1 dollar bills and an infinite set of 20 dollar bills?

Published on 13 Apr 2026 - 20:19

score 855 · Answer 2 · 2026-04-12 22:48:09

855

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Linear algebra: Direct sum decomposition

Published on 12 Apr 2026 - 22:48

score 472 · Answer 3 · 2026-04-14 08:59:32

472

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Is $\Bbb Q$ a decomposable module over $\Bbb Z$ or not?

Published on 14 Apr 2026 - 8:59

score 78 · Answer 4 · 2026-04-17 11:30:58

78

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If $M = P \oplus Q$ then is $M\cap N = (P \cap N) \oplus (Q \cap N)$

Published on 17 Apr 2026 - 11:30

score 35 · Answer 5 · 2026-04-17 05:10:32

35

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Let $M=\Bbb Z^2$ . If $N$ and $P$ internal direct summands of $M$ , then does it follow that $N+P$ is also an internal direct summand of $M$

Published on 17 Apr 2026 - 5:10

score 135 · Answer 6 · 2026-04-07 23:02:15

135

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Addition and Direct Sums of Subspaces

Published on 07 Apr 2026 - 23:02

score 129 · Answer 7 · 2026-04-12 07:58:01

129

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Existence of subspace

Published on 12 Apr 2026 - 7:58

score 96 · Answer 8 · 2026-04-11 22:14:43

96

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Direct Sum involving integration

Published on 11 Apr 2026 - 22:14

score 261 · Answer 9 · 2026-04-12 11:30:54

261

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Theorem about projections and direct sums

Published on 12 Apr 2026 - 11:30

score 99 · Answer 10 · 2026-04-12 20:34:01

99

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Show this representation of $\mathfrak{sl}_2(\mathbb C)$ is completely reducible

Published on 12 Apr 2026 - 20:34

score 68 · Answer 11 · 2026-05-10 15:22:28

68

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summation properties of three subspaces?

Published on 10 May 2026 - 15:22

score 41 · Answer 12 · 2026-04-16 09:53:46

41

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Proof that $fV=fV_1\bigoplus \cdots \bigoplus fV_k$

Published on 16 Apr 2026 - 9:53

score 73 · Answer 13 · 2026-04-16 10:45:31

73

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If $U =\{ f \in P_3| f(-1)=f(1)=0\}$ Then is $P_3 = U⊕P_2$?

Published on 16 Apr 2026 - 10:45

score 30 · Answer 14 · 2026-05-10 16:56:41

30

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How do I interpret all factors have a common finite exponent in this context?

Published on 10 May 2026 - 16:56

score 866 · Answer 15 · 2026-04-13 11:26:42

866

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How to find the sum of $n(n+1)$, $(2n-1)$ and $(3n-2)$

Published on 13 Apr 2026 - 11:26

List Question

What is the difference between an infinite set of 1 dollar bills and an infinite set of 20 dollar bills?

Linear algebra: Direct sum decomposition

Is $\Bbb Q$ a decomposable module over $\Bbb Z$ or not?

If $M = P \oplus Q$ then is $M\cap N = (P \cap N) \oplus (Q \cap N)$

Let $M=\Bbb Z^2$ . If $N$ and $P$ internal direct summands of $M$ , then does it follow that $N+P$ is also an internal direct summand of $M$

Addition and Direct Sums of Subspaces

Existence of subspace

Direct Sum involving integration

Theorem about projections and direct sums

Show this representation of $\mathfrak{sl}_2(\mathbb C)$ is completely reducible

summation properties of three subspaces?

Proof that $fV=fV_1\bigoplus \cdots \bigoplus fV_k$

If $U =\{ f \in P_3| f(-1)=f(1)=0\}$ Then is $P_3 = U⊕P_2$?

How do I interpret all factors have a common finite exponent in this context?

How to find the sum of $n(n+1)$, $(2n-1)$ and $(3n-2)$

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