Set theory

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English: Set theory is a branch of Mathematics.
It's regarded the foundation of mathematics, and closely related with logic.


Operations on and relations between two sets[edit]

The Venn diagrams in the left matrix represent set operations - e.g. the intersection Venn0001.svg,
those in the right matrix represent set relations - e.g. the subset relation Relation1011.svg, more usually represented by an Euler diagram: Venn A subset B.svg
The set theoretic descriptions are over the Venn diagrams:

 
c
          
A = A
1111 1111
 
Ac  Bc
true
A ↔ A
 
 B
 
 Bc
AA
 
 
 Bc
1110 0111 1110 0111
 
 Bc
¬A  ¬B
A → ¬B
 
 B
 B
A ← ¬B
 
Ac B
 
A B
A¬B
 
 
A = Bc
A¬B
 
 
A B
1101 0110 1011 1101 0110 1011
 
Bc
 ¬B
A ← B
 
A
 B
A ↔ ¬B
 
Ac
¬A  B
A → B
 
B
 
B =
AB
 
 
A = c
A¬B
 
 
A =
AB
 
 
B = c
1100 0101 1010 0011 1100 0101 1010 0011
¬B
 
 
 Bc
A
 
 
(A  B)c
¬A
 
 
Ac  B
B
 
Bfalse
 
Atrue
 
 
A = B
Afalse
 
Btrue
 
0100 1001 0010 0100 1001 0010
 ¬B
 
 
Ac  Bc
 B
 
 
 B
¬A  B
 
AB
 
1000 0001 1000 0001
¬A  ¬B
 
 
 B
 
 
A = Ac
0000 0000
false
A ↔ ¬A
A¬A
 
These sets or statements have complements
or negations. They are shown inside this matrix.
These relations are statements, and have negations.
They are shown in a seperate matrix in the box below.



Syllogisms[edit]

Syllogisms can be described in the language of set theory.

1 Modus Barbara.svg
Barbara
Modus Barbari.svg
Barbari
Modus Darii.svg
Darii
Modus Ferio.svg
Ferio
Modus Celaront.svg
Celaront
Modus Celarent.svg
Celarent
2 Modus Festino.svg
Festino
Modus Cesaro.svg
Cesaro
Modus Cesare.svg
Cesare
Modus Camestres.svg
Camestres
Modus Camestros.svg
Camestros
Modus Baroco.svg
Baroco
3 Modus Darapti.svg
Darapti
Modus Datisi.svg
Datisi
Modus Disamis.svg
Disamis
Modus Felapton.svg
Felapton
Modus Ferison.svg
Ferison
Modus Bocardo.svg
Bocardo
4 Modus Bamalip.svg
Bamalip
Modus Dimatis.svg
Dimatis
Modus Fesapo.svg
Fesapo
Modus Fresison.svg
Fresison
Modus Calemes.svg
Calemes
Modus Calemos.svg
Calemos
Venn- and Euler diagrams

Partitions[edit]

Various files[edit]