Coexistence and Persistence of Strange Attractors by Antonio Pumarino, Angel J. Rodriguez

By Antonio Pumarino, Angel J. Rodriguez

Even though chaotic behaviour had frequently been saw numerically past, the 1st mathematical facts of the lifestyles, with optimistic likelihood (persistence) of wierd attractors used to be given by way of Benedicks and Carleson for the Henon relations, at the start of 1990's. Later, Mora and Viana proven unusual attractor is usually continual in wide-spread one-parameter households of diffeomorphims on a floor which unfolds homoclinic tangency. This publication is ready the patience of any variety of unusual attractors in saddle-focus connections. The coexistence and patience of any variety of unusual attractors in an easy 3-dimensional state of affairs are proved, in addition to the truth that infinitely a lot of them exist at the same time.

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Otherwise, the lemma follows easily by taking a sufficiently large A so that U~ C W. o(co)t -> The proof ends if u - v0 _> co 1 log (3ColA2). So, let us assume that v - Uo < Co1 log (3ColA2). o(a,) - c~l = e - i . o(a,)) < 0. The proof finishes by taking A such thatc~ >e -A+e __IA 2 . 18. Suppose that # < n is a return of co G P,~-I, with host interval I+,k. Let p be the length of its binding period and co, E P~ such that w C co,. 2) If it is an essential return and it' is the first return situation of w u after #, then I{,'(co~)l >- e~qe-~+~'m].

WEP~ To begin the inductive process, fix A sufficiently large to get all the previous estimates. 2, there exists a l ( k ) < a(k) such t h a t if a E [al(A), a(A)], then we have exponential growth on all the free iterates before the first return. 5 furnishes an interval ~~Y-1 = [aN(A), a(A)] with aN(A) > hi(A), such t h a t , for every a E f~g-1, (BAn), (FAn) and (F, On-1) are satisfied up to n = N - 1. Therefore, we take f/ = f/N-1 to begin the inductive process. ,N- 1. Now, let n > N . Let us assume the following conditions for every element w of the p a r t i t i o n P ~ - I : H .

Proof. First, suppose that n >_ it, +p, + i. 3), [D~(a)l (/~q')' (~,,+p,+l(a)) ( E ' + x ) ' (Ira(a)) >_ c~+le-Ae ~~ where F,~(a) = qo + ql --F ... + q~ >_ (1 - c~)n according to (FAn). Once c < co is fixed, take a < < 1 such that c o ( l - a) > c + ~ . C~+l e - a e ~F'(a) > c~+ l e89 Then, if tiN > 2A, we have e ~. (a)l > C~,+1 e~-,<,,,e > /A',-'(~+~o~(lo~,-')) to, ~ _,<~'~'~ ) e > by taking A sufficiently large so that (f7 + log (10A-l)) a -1 logC0 + [ a > 0. Now, assume that n < #s + p~. 3) and use (BAn) to obtain [D~(a)l > Ce-2~ c~ where C > 1 is a bound of the second derivative of f~ in a neighbourhood of the critical point.

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