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A Class of Irreducible Polynomials
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For any polynomial
f (X) ∈ Q[X], write f (X) in the form f(x) =a0+a1X+....+adXd / q
with q,a0,a1,......,aad ∈ Z,q > 1,q as small as possible, then set
H(f) = max{|a0|,|a1|,......,|ad|,q}
we show that for any relatively prime polynomials f(x), g(x) ∈ Q[X] with deg f < deg g = d, and any prime number p>2dd H(f)d+1 H(g)3d, the polynomial f(X) + pg(X) is irreducible over Q. we also condider the more general case of polynomial defined over a number field.
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