Complexity and Complexity Theories: Do These Concepts Make Sense?

In light of the recently published book Complexity 5 Questions, edited by Carlos Gershenson, I discuss some of the Complexity theories (including my own field “Synergetics”) with respect to their applicability to cities. This book, with contributions by 24 leading scientists, shows that there is no general consensus on “Complexity”. Nevertheless, I believe that there is some common ground for an approach to what one might call a “theory of a city”, even if it remains an open ended story.

[1]  Carlos Gershenson.  Complexity: 5 Questions , 2008 .

[2]  Albert-László Barabási,et al.  Linked - how everything is connected to everything else and what it means for business, science, and everyday life , 2003 .

[3]  H. Haken,et al.  Treatment of combinatorial optimization problems using selection equations with cost terms. Part II. NP -hard three-dimensional assignment problems , 1999 .

[4]  J. Portugali,et al.  The face of the city is its information , 2003 .

[5]  J. Deng,et al.  Introduction to Grey system theory , 1989 .

[6]  Professor Dr. Dr. h.c. Hermann Haken,et al.  Synergetic Computers and Cognition , 1991, Springer Series in Synergetics.

[7]  Leon O. Chua,et al.  A Nonlinear Dynamics Perspective of Wolfram's New Kind of Science Part XI: Period-2 Rules , 2009, Int. J. Bifurc. Chaos.

[8]  Juval Portugali,et al.  Self-Organization and the City , 2009, Encyclopedia of Complexity and Systems Science.

[9]  A. Opstal.  Dynamic Patterns: The Self-Organization of Brain and Behavior , 1995 .

[10]  D. Watts.  The “New” Science of Networks , 2004 .

[11]  L. A. Zadeh,et al.  Fuzzy logic and approximate reasoning , 1975, Synthese.

[12]  J. Lopreato,et al.  General system theory : foundations, development, applications , 1970 .

[13]  H. Haken.  Principles of brain functioning , 1995 .

[14]  E. Lorenz.  Deterministic nonperiodic flow , 1963 .

[15]  H. Haken,et al.  A theoretical model of phase transitions in human hand movements , 2004, Biological Cybernetics.