January 1, 2026AperiodicityAperiodic StateDefinition: A state $i$ is aperiodic if its period satisfies $d(i)=1$.Direct Condition: If $P_{ii} > 0$, then $d(i)=1$, so the state is aperiodic.RelatedSTA447PeriodicityAbsorbing StateTransition MatrixCommunication ClassCourse Notes