Read e-book online Algebraic K-Theory and Algebraic Number Theory PDF

By Stein M.R., Dennis R.K. (eds.)

ISBN-10: 0821850903

ISBN-13: 9780821850909

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Vol. 70, No. 4, October 1998 1485 It is sometimes useful to know how many basins of attraction can coexist with a strange attractor. This kind of information is outside the scope of most studies, which are confined to the attractor itself. However, we can provide an answer. Suppose an attractor is identified by a basis set of t unstable periodic orbits up to period p. Then there is a perturbation that neither creates nor annihilates orbits by saddle-node bifurcations, but which moves each of the basis orbits to the verge of saddle-node annihilation.

70, No. 4, October 1998 braid type are identified by their spectrum of selfrelative rotation rates. They also have the same period and topological entropy. To period eight, there are six such groupings: ͕ 8 4 ,87 ͖ , ͕ 7 6 ,77 ͖ , ͕ 8 13,814͖ , ͕ 7 3 ,74 ͖ , ͕ 8 5 ,86 ,88 ͖ , and ͕ 8 10,811͖ . The self-relative rotation rates are sufficient to distinguish braid type to period 10 but not period 11. Through period eight, orbit forcing in the horseshoe is shown in Fig. 38. The orbits are located in this figure according to their U-sequence order (one-dimensional entropy) along the horizontal axis and their topological entropy along the vertical axis.

At the present time, the only topological invariants we can construct for the unstable periodic orbits in strange attractors are the linking numbers and relative rotation rates, which can be constructed for knots in R 3 . In higher dimensions links fall apart. The only impediment to extending this topological-analysis method to higher dimensions is the construction of topological invariants for strange attractors in R n for nϾ3. D. Identify a template By this stage, the first step in identifying a template has already been taken.

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Algebraic K-Theory and Algebraic Number Theory by Stein M.R., Dennis R.K. (eds.)


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