Question

Why do we first introduce the open set definition for continuity instead of the neighborhood definition?

score 2k · Answer 1 · 2026-03-26 07:59:20

2k

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Why do we first introduce the open set definition for continuity instead of the neighborhood definition?

Published on 26 Mar 2026 - 7:59

score 370 · Answer 2 · 2014-12-16 17:12:03

370

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Why is the axiom of choice not taught from the start to mathematics undergraduates?

Published on 16 Dec 2014 - 17:12

score 506 · Answer 3 · 2026-03-28 00:28:46

506

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Sources for mathematics outside the mathematics world

Published on 28 Mar 2026 - 0:28

score 98 · Answer 4 · 2014-12-16 20:08:33

98

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Printer toner coverage

Published on 16 Dec 2014 - 20:08

score 4.5k · Answer 5 · 2026-03-26 04:52:26

4.5k

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So bad at math sometimes I feel depressed about it.

Published on 26 Mar 2026 - 4:52

score 179 · Answer 6 · 2014-12-16 21:27:12

179

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Is there a proof that $\int \frac {dx}{x}=\ln |x|+c$?

Published on 16 Dec 2014 - 21:27

score 977 · Answer 7 · 2026-03-28 00:30:27

977

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Examples of useful, insightful, and interesting hand-waving

Published on 28 Mar 2026 - 0:30

score 21.4k · Answer 8 · 2026-03-25 02:31:35

21.4k

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Why do we need to learn Set Theory?

Published on 25 Mar 2026 - 2:31

score 52 · Answer 9 · 2014-12-22 09:14:11

52

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Components of a vector

Published on 22 Dec 2014 - 9:14

score 103 · Answer 10 · 2026-03-25 23:36:40

103

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Is it correct to define variables and functions that are more than one character?

Published on 25 Mar 2026 - 23:36

score 3.8k · Answer 11 · 2014-12-22 15:32:14

3.8k

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Solving min-max optimization problems in original ways (that is, avoiding the frenzy of differentiation)

Published on 22 Dec 2014 - 15:32

score 10.2k · Answer 12 · 2014-12-22 16:21:57

10.2k

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I want to learn math from zero

Published on 22 Dec 2014 - 16:21

score 479 · Answer 13 · 2026-03-28 02:04:54

479

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Natural progression in a curriculum for self-study of analysis

Published on 28 Mar 2026 - 2:04

score 606 · Answer 14 · 2014-12-23 01:44:24

606

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Let $\{a_n\}_{n=1}^\infty$ be an infinite sequence. Does there exist an infinite series whose partial sums is $\{a_n\}_{n=1}^\infty$?

Published on 23 Dec 2014 - 1:44

score 14.2k · Answer 15 · 2026-03-28 02:09:34

14.2k

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Easy example why complex numbers are cool

Published on 28 Mar 2026 - 2:09

List Question

Why do we first introduce the open set definition for continuity instead of the neighborhood definition?

Why is the axiom of choice not taught from the start to mathematics undergraduates?

Sources for mathematics outside the mathematics world

Printer toner coverage

So bad at math sometimes I feel depressed about it.

Is there a proof that $\int \frac {dx}{x}=\ln |x|+c$?

Examples of useful, insightful, and interesting hand-waving

Why do we need to learn Set Theory?

Components of a vector

Is it correct to define variables and functions that are more than one character?

Solving min-max optimization problems in original ways (that is, avoiding the frenzy of differentiation)

I want to learn math from zero

Natural progression in a curriculum for self-study of analysis

Let $\{a_n\}_{n=1}^\infty$ be an infinite sequence. Does there exist an infinite series whose partial sums is $\{a_n\}_{n=1}^\infty$?

Easy example why complex numbers are cool

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