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Connected to relation: различия между версиями
Материал из WEGA
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'''Connected to relation''' | '''Connected to relation''' — ''[[отношение связности ''к'']], [[(достижимость) в гиперграфе]].'' | ||
The relation '''connected to''', which is denoted by the symbol | The relation '''connected to''', which is denoted by the symbol | ||
<math>\succ</math>, is defined for a given subset <math>R</math> of nodes and a node <math>y</math>; | <math>\succ</math>, is defined for a given subset <math>\,R</math> of nodes and a [[node]] <math>\,y</math>; | ||
we say that <math>R</math> is '''connected to''' <math>y</math> and write <math>R \succ y</math> if and only if a ''directed hyperpath'' exsists in a hypergraph from <math>R</math> | we say that <math>\,R</math> is '''connected to''' <math>\,y</math> and write <math>R \succ y</math> if and only if a ''[[directed hyperpath]]'' exsists in a [[hypergraph]] from <math>\,R</math> | ||
to the node <math>y</math>. | to the node <math>\,y</math>. | ||
It is easy to check that the relation <math>\succ</math> satisfies the following set of | It is easy to check that the relation <math>\succ</math> satisfies the following set of | ||
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(3) <math>R \succ y, \; \forall y \in Y,\mbox{ and }Y \succ z \Rightarrow | (3) <math>R \succ y, \; \forall y \in Y,\mbox{ and }Y \succ z \Rightarrow | ||
R \succ z</math> (transitivity). | R \succ z</math> (transitivity). | ||
==Литература== | |||
* Евстигнеев В.А., Касьянов В.Н. Словарь по графам в информатике. — Новосибирск: Сибирское Научное Издательство, 2009. | |||
