Random Diophantine Equations
Random Diophantine Equations
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随机丢番图方程
DOI:
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发表时间:
2003
期刊:
影响因子:
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通讯作者:
N. M. Katz
中科院分区:
文献类型:
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作者:
J. Colliot;N. M. Katz
Fix n, d ≥ 2. Let Z[x0, . . . , xn]d denote the set of homogeneous polynomials in Z[x0, . . . , xn] of degree d. Let m = ( n+d d ) denote the number of monomials in x0, . . . , xn of degree d. Define the height h(f) of f ∈ Z[x0, . . . , xn]d as the maximum of the absolute values of the coefficients of f . Let MQ be the set of places of Q, and let Qv be the completion of Q at the place v. Define Ntot(H) = #{ f ∈ Z[x0, . . . , xn]d : h(f) ≤ H } = (2bHc+ 1) , N(H) = #{ f ∈ Z[x0, . . . , xn]d : h(f) ≤ H, and ∃x ∈ Z \ {0} with f(x) = 0 }, Nloc(H) = #{ f ∈ Z[x0, . . . , xn]d : h(f) ≤ H, and ∀v ∈ MQ,∃x ∈ Q v \ {0} with f(x) = 0 }. The limit of N(H)/Ntot(H) as H →∞, if it exists, will be called the proportion of globally solvable hypersurfaces. Similarly, the limit of Nloc(H)/Ntot(H) will be called the proportion of locally solvable hypersurfaces.