These sets (statements) have complements (negations). They are in the opposite position within this matrix.
These relations are statements, and have negations. They are shown in a separate matrix in the box below.
more relations
The operations, arranged in the same matrix as above. The 2x2 matrices show the same information like the Venn diagrams. (This matrix is similar tothis Hasse diagram.)
In set theory the Venn diagrams represent the set, which is marked in red.
These 15 relations, except the empty one, areminterms and can be the case. The relations in the files below aredisjunctions. The red fields of their 4x4 matrices tell, in which ofthese cases the relation is true. (Inherently only conjunctions can be the case. Disjunctions are true in several cases.) In set theory the Venn diagrams tell, that there is an element in every red, and there is no element in any black intersection.
Negations of the relations in the matrix on the right. In the Venn diagrams the negation exchanges black and red.
In set theory the Venn diagrams tell, that there is an element in one of the red intersections. (Theexistential quantifications for the red intersections are combined byor. They can becombined by theexclusive or as well.)
{{Information |Description=Venn diagrams (sometimes called Johnston diagrams) concerning propositional calculus and set theory |Source=own work |Date=2008/Jan/22 |Author=Tilman Piesk |Permission=publich domain |other_versions= }}
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