Event structure

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In mathematics and computer science, an event structure represents a set of events, some of which can only be performed after another (there is a dependency between the events) and some of which might not be performed together (there is a conflict between the events).

Formal definition[edit]

An event structure consists of

  • a set of events
  • a partial order relation on called causal dependency,
  • an irreflexive symmetric relation called incompatibility (or conflict)

such that

  • finite causes: for every event , the set of predecessors of in is finite
  • hereditary conflict: for every events , if and then .

See also[edit]


  • Winskel, Glynn (1987). "Event Structures" (PDF). Advances in Petri Nets. Lecture Notes in Computer Science. Springer.