Question

How many different operations can be defined in a finite groupoid with a given property?

score 65 · Answer 1 · 2026-04-23 06:55:17

65

Views

How many different operations can be defined in a finite groupoid with a given property?

Published on 23 Apr 2026 - 6:55

score 67 · Answer 2 · 2026-04-23 00:26:14

67

Views

How to find ways to vote when some candidates receive no votes using PIE

Published on 23 Apr 2026 - 0:26

score 152 · Answer 3 · 2026-04-14 07:05:02

152

Views

Are all the uncountable infinite always greater than countable infinite?

Published on 14 Apr 2026 - 7:05

score 76 · Answer 4 · 2026-04-16 03:55:49

76

Views

Let $f$ be the function of $P(A)-${$Ø$} in $A$ defined for: $f(S)=$first element of $S$. Prove that $f$ is surjective.

Published on 16 Apr 2026 - 3:55

score 74 · Answer 5 · 2026-04-16 05:30:55

74

Views

Any uses for non-surjective relations (not just non-surjective functions)?

Published on 16 Apr 2026 - 5:30

score 144 · Answer 6 · 2026-04-13 01:03:24

144

Views

How to express difference of sets?

Published on 13 Apr 2026 - 1:03

score 59 · Answer 7 · 2026-04-13 15:49:44

59

Views

Applying cantor diagonal argument recursively: How to show the resulting construction is incomplete?

Published on 13 Apr 2026 - 15:49

score 331 · Answer 8 · 2026-04-15 15:52:39

331

Views

Cartesian product of two unions of sets of sets $\subseteq$ union of products of sets

Published on 15 Apr 2026 - 15:52

score 1.7k · Answer 9 · 2026-04-13 08:44:32

1.7k

Views

Simple way to write set of elements that are in either set but not both

Published on 13 Apr 2026 - 8:44

score 58 · Answer 10 · 2026-04-13 04:55:46

58

Views

How would you write the following set?

Published on 13 Apr 2026 - 4:55

score 1.9k · Answer 11 · 2026-04-11 18:48:35

1.9k

Views

Does null set contain one element or no elements?

Published on 11 Apr 2026 - 18:48

score 136 · Answer 12 · 2026-04-14 00:50:51

136

Views

Help with the proof: union $A\cup B$ of two countably infinite sets $A,B$ is countably infinite

Published on 14 Apr 2026 - 0:50

score 1.3k · Answer 13 · 2026-04-15 22:44:06

1.3k

Views

For any two finite sets $X$ and $Y$, prove that $\#(Y^X)=\#(Y)^{\#(X)}$ by induction

Published on 15 Apr 2026 - 22:44

score 223 · Answer 14 · 2026-04-15 16:01:36

223

Views

Prove Cardinality of Sets Exponentiation

Published on 15 Apr 2026 - 16:01

score 69 · Answer 15 · 2026-04-10 19:38:56

69

Views

Order of Two Operators

Published on 10 Apr 2026 - 19:38

List Question

How many different operations can be defined in a finite groupoid with a given property?

How to find ways to vote when some candidates receive no votes using PIE

Are all the uncountable infinite always greater than countable infinite?

Let $f$ be the function of $P(A)-${$Ø$} in $A$ defined for: $f(S)=$first element of $S$. Prove that $f$ is surjective.

Any uses for non-surjective relations (not just non-surjective functions)?

How to express difference of sets?

Applying cantor diagonal argument recursively: How to show the resulting construction is incomplete?

Cartesian product of two unions of sets of sets $\subseteq$ union of products of sets

Simple way to write set of elements that are in either set but not both

How would you write the following set?

Does null set contain one element or no elements?

Help with the proof: union $A\cup B$ of two countably infinite sets $A,B$ is countably infinite

For any two finite sets $X$ and $Y$, prove that $\#(Y^X)=\#(Y)^{\#(X)}$ by induction

Prove Cardinality of Sets Exponentiation

Order of Two Operators

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