Trigonometric sums and summation formulas have long served as essential tools for elucidating periodic phenomena across mathematics and the physical sciences. These techniques entail the explicit ...

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Abstract: In this paper, we consider approximation to trigonometric polynomial function by using a one-hidden-layer feedforward neural networks, and obtain the upper bounds of trigonometric function ...

Abstract: In this brief, a novel three-dimensional non-autonomous chaotic system with periodic excitation and trigonometric function is proposed. Interestingly, with the disturbance of the periodic ...