, Volume 124, Issue 3, pp 297–322

Physical Emergence, Diachronic And Synchronic

  • Alexander Rueger

DOI: 10.1023/A:1005249907425

Cite this article as:
Rueger, A. Synthese (2000) 124: 297. doi:10.1023/A:1005249907425


This paper explicates two notions of emergencewhich are based on two ways of distinguishinglevels of properties for dynamical systems.Once the levels are defined, the strategies ofcharacterizing the relation of higher level to lower levelproperties as diachronic and synchronic emergenceare the same. In each case, the higher level properties aresaid to be emergent if they are ‘novel’ or ‘irreducible’ with respect to the lower level properties. Novelty andirreducibility are given precise meanings in terms of the effectsthat the change of a bifurcation or perturbation parameterin the system has. (The same strategy can be applied to otherways of separating levels of properties, like themicro/macro distinction.)

The notions of emergence developed here are notions of emergencein a weak sense: the higher level emergent properties wecapture are always structural properties (or are realized insuch properties), that is, they are defined in terms of the lowerlevel properties and their relations. Diachronic and synchronicemergent properties are distinctions within thecategory of structural properties.

Copyright information

© Kluwer Academic Publishers 2000

Authors and Affiliations

  • Alexander Rueger
    • 1
  1. 1.Department of PhilosophyUniversity of AlbertaEdmontonCanada