03 Relationen (Beziehungen) Flashcards

1
Q

binäre Relation ist…

A

eine Teilmenge R des kartesischen Produkts MxM einer Menge mit sich selbst

R Teilmenge MxM

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2
Q

reflexiv

A

aRa

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3
Q

irreflexiv

A

-(aRa)

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4
Q

symmetrisch

A

aRb -> bRa

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5
Q

antisymmetrisch

A

aRb und bRa –> a=b

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6
Q

asymmetrisch

A

aRb –> -(bRa)

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7
Q

transitiv

A

aRb und bRc –> aRc

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8
Q

wenn antisymmetrisch und irreflexiv

A

dann asymmetrisch

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9
Q

wenn asymmetrisch, dann nicht

A

symmetrisch

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10
Q

wenn asymmetrisch, dann

A

antisymmetrisch und irreflexiv

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11
Q

wenn irreflexiv, dann

A

reflexiv

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