Nonlinear Sciences – Adaptation and Self-Organizing Systems
Scientific paper
2006-03-12
Complexity 13(5):16-22, 2008.
Nonlinear Sciences
Adaptation and Self-Organizing Systems
14 pages, 2 figures. Complexity, in press
Scientific paper
10.1002/cplx.20218
This essay aims to propose construction theory, a new domain of theoretical research on machine construction, and use it to shed light on a fundamental relationship between living and computational systems. Specifically, we argue that self-replication of von Neumann's universal constructors holds a close similarity to circular computational processes of universal computers that appear in Turing's original proof of the undecidability of the halting problem. The result indicates the possibility of reinterpreting a self-replicating biological organism as embodying an attempt to solve the halting problem for a {\em diagonal} input in the context of construction. This attempt will never be completed because of the indefinite cascade of self-computation/construction, which accounts for the undecidability of the halting problem and also agrees well with the fact that life has maintained its reproductive activity for an indefinitely long period of time.
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