List questions from discrete-mathematics

Published on 25 Mar 2026 - 4:43

1k

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Example function which is partial, injective, and surjective

Published on 17 Mar 2026 - 17:10

124

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Find closed form for $a_n=2\frac{n-1}{n}a_{n-1}-2\frac{n-2}{n}a_{n-2}$ for all $n \ge 3$

Published on 29 Mar 2026 - 23:54

497

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Compound Propositions

Published on 19 Jan 2018 - 17:46

98

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Is $a^2 = b^2$ equivalent to $a=b$?

Published on 19 Jan 2018 - 19:15

214

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What's the probability that at least one passenger gets no seat?

Published on 24 Mar 2026 - 23:46

53

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Given the function $g$

Published on 19 Jan 2018 - 20:34

412

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Function counter-image...

Published on 31 Mar 2026 - 16:10

107

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Finding the inverse of a matrix

Published on 19 Jan 2018 - 21:18

73

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What is the number of ways to put 40 identical balls in 6 boxes while no box contains more than 14 balls.

Published on 19 Jan 2018 - 21:21

29

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Finite sequence length before and after removing repetitions

Published on 19 Jan 2018 - 22:56

52

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How to prove set containments on power sets?

Published on 20 Jan 2018 - 9:25

387

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Is a matrix NOT invertible when there are all zeros in a row?

Published on 20 Jan 2018 - 9:57

96

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Does this congruence equation system have no solutions?

Published on 25 Mar 2026 - 9:16

40

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A question about an antisymmetric relation.

Published on 20 Jan 2018 - 11:28

List Question

What is the Number of Non Isomorphic Spanning trees of $K_n$? (Complete graph of size n)

Example function which is partial, injective, and surjective

Find closed form for $a_n=2\frac{n-1}{n}a_{n-1}-2\frac{n-2}{n}a_{n-2}$ for all $n \ge 3$

Compound Propositions

Is $a^2 = b^2$ equivalent to $a=b$?

What's the probability that at least one passenger gets no seat?

Given the function $g$

Function counter-image...

Finding the inverse of a matrix

What is the number of ways to put 40 identical balls in 6 boxes while no box contains more than 14 balls.

Finite sequence length before and after removing repetitions

How to prove set containments on power sets?

Is a matrix NOT invertible when there are all zeros in a row?

Does this congruence equation system have no solutions?

A question about an antisymmetric relation.

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