Cuadro de texto: The abundance of solutions as the biological growth becomes faster with respect to the flow will reduce the basin of attraction of simple stable filaments. Collisions between asymmetric filaments are annihilating (as usual in unstirred excitable systems), at difference with the one-humped symmetric ones typical of fast flow/slow biology. THUS: at slow flow/fast biology, filaments tend to dissapear in chaotic regions. They can still survive, however, in calm regions (KAM, …) Cuadro de texto: At fast biology-slow flow: some lack of universality (geometry dependence) Cuadro de texto: = Cuadro de texto: = Ø

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