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First, fixed-time terminal attractors for fractional-order nonlinear systems are introduced on the basis of fixed-time stability of integer-order nonlinear differential equations and on defining certain fractional-order macro-variables. 2nd, a new synergetic observer aimed at the synchronisation of fractional-order crazy systems is developed. The recommended observer converges in a predefined fixed-time uniformly bounded with respect to preliminary conditions. Due to the step-by-step treatment, o