
For any discrete time dynamical system with a rational evolution, we define an entropy, which is a global index of complexity for the evolution map. We analyze its basic properties and its relations to the singularities and the irreversibility of the map. We indicate how it can be exactly calculated.
Latex, 12 pages, 1 figure
algebraic entropy, Nonlinear Sciences - Exactly Solvable and Integrable Systems, FOS: Physical sciences, Mathematical Physics (math-ph), Nonlinear Sciences - Chaotic Dynamics, real projective spaces, Discrete version of topics in analysis, Entropy and other invariants, isomorphism, classification in ergodic theory, Chaotic Dynamics (nlin.CD), Exactly Solvable and Integrable Systems (nlin.SI), homogeneous rational mappings, Mathematical Physics
algebraic entropy, Nonlinear Sciences - Exactly Solvable and Integrable Systems, FOS: Physical sciences, Mathematical Physics (math-ph), Nonlinear Sciences - Chaotic Dynamics, real projective spaces, Discrete version of topics in analysis, Entropy and other invariants, isomorphism, classification in ergodic theory, Chaotic Dynamics (nlin.CD), Exactly Solvable and Integrable Systems (nlin.SI), homogeneous rational mappings, Mathematical Physics
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