List questions from discrete-mathematics

278

Views

Proving $A \cup B \cup C = (A-B)\cup(B-C)\cup(C-A)\cup(A \cap B \cap C)$ - not sure why this reasoning is failing.

Published on 03 Apr 2026 - 17:32

35

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factors of a number

Published on 07 Jun 2018 - 16:57

1.6k

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Prove or show a counter example for: $\forall a, b, c \in \mathbb Z$, if $ab\mid c$ then $a\mid c$ and $b\mid c$

Published on 25 Mar 2026 - 22:30

177

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Generating a System of Recurrences from a Light Bulb Word Problem

Published on 27 Mar 2026 - 10:09

876

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Of the 4 properties (transitivity, anti-symmetry, symmetry, and reflexivity) that a relation could hold, which two are not possible?

Published on 25 Mar 2026 - 17:42

274

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Mobius function of the power set

Published on 06 Apr 2026 - 3:16

61

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Prove that f (n) = n

Published on 27 Mar 2026 - 10:16

117

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Is there an intuitive way to tell if some integers are relatively prime?

Published on 25 Mar 2026 - 6:24

342

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Fermat's Little Theorem: $r \equiv s \pmod {p-1} \implies a^r \equiv a^s \pmod p$

Published on 27 Mar 2026 - 13:47

584

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Guess a formula for $a_n$ and proof it by induction.

Published on 10 Jun 2018 - 14:09

1.2k

Views

Independence of random variables and events

Published on 26 Mar 2026 - 4:51

614

Views

Proof of a Combinatorial Abel Identity

Published on 26 Mar 2026 - 22:17

162

Views

Discrete maths.. whether the statement is valid

Published on 11 Jun 2018 - 12:18

62

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Discrete Mathematics - Transitivity

Published on 25 Mar 2026 - 17:28

77

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Discrete maths... Is this a valid argument??

Published on 11 Jun 2018 - 12:55

List Question

Proving $A \cup B \cup C = (A-B)\cup(B-C)\cup(C-A)\cup(A \cap B \cap C)$ - not sure why this reasoning is failing.

factors of a number

Prove or show a counter example for: $\forall a, b, c \in \mathbb Z$, if $ab\mid c$ then $a\mid c$ and $b\mid c$

Generating a System of Recurrences from a Light Bulb Word Problem

Of the 4 properties (transitivity, anti-symmetry, symmetry, and reflexivity) that a relation could hold, which two are not possible?

Mobius function of the power set

Prove that f (n) = n

Is there an intuitive way to tell if some integers are relatively prime?

Fermat's Little Theorem: $r \equiv s \pmod {p-1} \implies a^r \equiv a^s \pmod p$

Guess a formula for $a_n$ and proof it by induction.

Independence of random variables and events

Proof of a Combinatorial Abel Identity

Discrete maths.. whether the statement is valid

Discrete Mathematics - Transitivity

Discrete maths... Is this a valid argument??

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