Question

Infimum of majorizing piecewise constant fuctions

score 72 · Answer 1 · 2026-04-11 18:53:33

72

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Infimum of majorizing piecewise constant fuctions

Published on 11 Apr 2026 - 18:53

score 73 · Answer 2 · 2026-04-12 09:46:42

73

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Dilution of coffee in a mug placed under the tap

Published on 12 Apr 2026 - 9:46

score 1.8k · Answer 3 · 2026-04-11 12:04:49

1.8k

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Are global extrema necessarily local extrema?

Published on 11 Apr 2026 - 12:04

score 1.4k · Answer 4 · 2026-04-09 07:17:03

1.4k

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Values of c for which the function has a horizontal/vertical asymptote

Published on 09 Apr 2026 - 7:17

score 999 · Answer 5 · 2026-04-16 04:38:33

999

Views

Find the maximum value of $f(x,y)=x^2+y^2$ in the region bounded by $y=\frac x2,y=-\frac x2$ and $x=y^2+1$,including the boundary lines

Published on 16 Apr 2026 - 4:38

score 54 · Answer 6 · 2026-04-12 11:30:42

54

Views

Determining the continuity of $[x]-[-x]$

Published on 12 Apr 2026 - 11:30

score 98 · Answer 7 · 2026-04-12 20:07:57

98

Views

Is $\cos(x+y)=e^x$ an implicit function?

Published on 12 Apr 2026 - 20:07

score 4k · Answer 8 · 2026-04-10 12:13:44

4k

Views

Inequality involving supremum and integral

Published on 10 Apr 2026 - 12:13

score 2.8k · Answer 9 · 2026-04-13 14:08:20

2.8k

Views

Horizontal line test in graphs

Published on 13 Apr 2026 - 14:08

score 44 · Answer 10 · 2026-04-15 07:00:10

S is a set of three words: “At” “Bat” and “Cat”. For each word w in S, f w( ) is defined as the number of letters in w. What is the range of f?

score 70 · Answer 11 · 2026-04-17 04:30:54

70

Views

Prove that if $f,g:\{0,...,n\}\to\mathbb{R}$ are two strictly increasing functions with the same image then it must be the case that $f=g$

Published on 17 Apr 2026 - 4:30

score 290 · Answer 12 · 2026-04-15 23:35:53

290

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prove that: $|\{x\in\mathbb{\mathbb{R}}:\text{ }\exists r\in S \frac{x}{r}\in\mathbb{N}\}|= |\mathbb{N}|$

Published on 15 Apr 2026 - 23:35

score 67 · Answer 13 · 2026-04-19 12:07:49

67

Views

How to find whether a function is injective or surjective

Published on 19 Apr 2026 - 12:07

score 317 · Answer 14 · 2026-04-11 10:27:58

317

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What is the function if the second differences have a common multiplier?

Published on 11 Apr 2026 - 10:27

score 86 · Answer 15 · 2026-04-10 16:47:26

86

Views

Not piecewise function constant in an interval

Published on 10 Apr 2026 - 16:47

List Question

Infimum of majorizing piecewise constant fuctions

Dilution of coffee in a mug placed under the tap

Are global extrema necessarily local extrema?

Values of c for which the function has a horizontal/vertical asymptote

Find the maximum value of $f(x,y)=x^2+y^2$ in the region bounded by $y=\frac x2,y=-\frac x2$ and $x=y^2+1$,including the boundary lines

Determining the continuity of $[x]-[-x]$

Is $\cos(x+y)=e^x$ an implicit function?

Inequality involving supremum and integral

Horizontal line test in graphs

S is a set of three words: “At” “Bat” and “Cat”. For each word w in S, f w( ) is defined as the number of letters in w. What is the range of f?

Prove that if $f,g:\{0,...,n\}\to\mathbb{R}$ are two strictly increasing functions with the same image then it must be the case that $f=g$

prove that: $|\{x\in\mathbb{\mathbb{R}}:\text{ }\exists r\in S \frac{x}{r}\in\mathbb{N}\}|= |\mathbb{N}|$

How to find whether a function is injective or surjective

What is the function if the second differences have a common multiplier?

Not piecewise function constant in an interval

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