Question

When is it valid to take only the positive square root of a number when doing proofs?

score 101 · Answer 1 · 2026-04-11 09:13:29

101

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When is it valid to take only the positive square root of a number when doing proofs?

Published on 11 Apr 2026 - 9:13

score 564 · Answer 2 · 2026-04-04 01:18:25

564

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Atiyah Macdonald proposition 2.19

Published on 04 Apr 2026 - 1:18

score 180 · Answer 3 · 2026-04-02 02:01:31

180

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Simply this expression $\frac{\log_a(\log_b(a))}{\log_b(\log_a(b))}$

Published on 02 Apr 2026 - 2:01

score 48 · Answer 4 · 2026-04-11 03:57:59

48

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Evaluating limit of sequence from $\epsilon$ definition

Published on 11 Apr 2026 - 3:57

score 64 · Answer 5 · 2026-03-26 07:35:21

64

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Laurent Series of $f(z)=\frac{2}{(z+2)^2}-\frac{5}{z-4}$ that converges at $z=1$ in powers of $z-2$

Published on 26 Mar 2026 - 7:35

score 30 · Answer 6 · 2026-04-11 07:47:14

30

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Most Important Feature from Weights

Published on 11 Apr 2026 - 7:47

score 378 · Answer 7 · 2018-09-27 09:50:20

378

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Logical Gap? Sheldon Axler "Linear Algebra Done Right 3rd Edition" p.18 1.34 Conditions for a subspace

Published on 27 Sep 2018 - 9:50

score 212 · Answer 8 · 2026-03-31 03:34:47

212

Views

Proof involving dot product of 3 vectors

Published on 31 Mar 2026 - 3:34

score 57 · Answer 9 · 2018-09-27 13:49:07

57

Views

If $(f_{n})_{n}$ are measurable prove $A := \{x : \lim f_{n}(x)\text{ exists}\}$ is measurable

Published on 27 Sep 2018 - 13:49

score 440 · Answer 10 · 2018-09-27 13:56:43

440

Views

A Topology containing every infinite subset of a an infinite set is discrete.

Published on 27 Sep 2018 - 13:56

score 74 · Answer 11 · 2026-04-09 19:10:26

74

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Mathematical induction (theory)

Published on 09 Apr 2026 - 19:10

score 1.6k · Answer 12 · 2026-04-11 01:50:24

1.6k

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Urn probability with replacement

Published on 11 Apr 2026 - 1:50

score 164 · Answer 13 · 2026-04-02 03:53:15

164

Views

Why does $\sqrt{\frac{x^2-2x+1}{x^2-1}}$ exist at $x = 1$?

Published on 02 Apr 2026 - 3:53

score 148 · Answer 14 · 2026-03-26 07:38:52

Let $(P,<)$ and $(Q,\prec)$ be countable, dense, and linearly ordered sets without endpoints. Then $(P,<)$ and $(Q,\prec)$ are order-isomorphic

score 83 · Answer 15 · 2018-09-28 03:41:17

83

Views

Where is this power set proof wrong if I can find a counterexample?

Published on 28 Sep 2018 - 3:41

List Question

When is it valid to take only the positive square root of a number when doing proofs?

Atiyah Macdonald proposition 2.19

Simply this expression $\frac{\log_a(\log_b(a))}{\log_b(\log_a(b))}$

Evaluating limit of sequence from $\epsilon$ definition

Laurent Series of $f(z)=\frac{2}{(z+2)^2}-\frac{5}{z-4}$ that converges at $z=1$ in powers of $z-2$

Most Important Feature from Weights

Logical Gap? Sheldon Axler "Linear Algebra Done Right 3rd Edition" p.18 1.34 Conditions for a subspace

Proof involving dot product of 3 vectors

If $(f_{n})_{n}$ are measurable prove $A := \{x : \lim f_{n}(x)\text{ exists}\}$ is measurable

A Topology containing every infinite subset of a an infinite set is discrete.

Mathematical induction (theory)

Urn probability with replacement

Why does $\sqrt{\frac{x^2-2x+1}{x^2-1}}$ exist at $x = 1$?

Let $(P,<)$ and $(Q,\prec)$ be countable, dense, and linearly ordered sets without endpoints. Then $(P,<)$ and $(Q,\prec)$ are order-isomorphic

Where is this power set proof wrong if I can find a counterexample?

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