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Define the set of streams over R/Z such that the convolution product P(z)\\times(x_n; n\\in Z)=(\\sum_{i=0}^k a_i x_{n-i}; n\\in Z)=(0; n\\in Z), which is called the stream 0 of P. 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Let P(z)=a_k z^k+...+a_1 z+a_0 be a polynomial with integer coefficients. Define the set of streams over R/Z such that the convolution product P(z)\\times(x_n; n\\in Z)=(\\sum_{i=0}^k a_i x_{n-i}; n\\in Z)=(0; n\\in Z), which is called the stream 0 of P. 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