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Constant problem : ウィキペディア英語版 | Constant problem In mathematics, the constant problem is the problem of deciding if a given expression is equal to zero. ==The problem== This problem is also referred to as the identity problem or the method of zero estimates. It has no formal statement as such but refers to a general problem prevalent in transcendental number theory. Often proofs in transcendence theory are proofs by contradiction, specifically they use some auxiliary function to create an integer ''n'' ≥ 0 which is shown to satisfy ''n'' < 1. Clearly this means that ''n'' must have the value zero, and so a contradiction arises if one can show that in fact ''n'' is ''not'' zero. In many transcendence proofs, proving that ''n'' ≠ 0 is very difficult, and hence a lot of work has been done to develop methods that can be used to prove the non-vanishing of certain expressions. The sheer generality of the problem is what makes it difficult to prove general results or come up with general methods for attacking it. The number ''n'' that arises may involve integrals, limits, polynomials, other functions, and determinants of matrices.
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