Block Korkin–Zolotarev Bases and Successive Minima
Block Korkin–Zolotarev Bases and Successive Minima
复制标题
阻止 Korkin-Zolotarev 基底和连续最小值
DOI:
10.1590/s0074-02761996000100006
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发表时间:
1992
影响因子:
2.8
通讯作者:
InformatikFebruary
中科院分区:
文献类型:
--
作者:
SuccessiveMinimaC;P.;SchnorrUniversitt;FrankfurtFachbereich;Mathematik;InformatikFebruary
Let b1, . . . , bm ∈ IR be an arbitrary basis of lattice L that is a block Korkin–Zolotarev basis with block size β and let λi(L) denote the successive minima of lattice L. We prove that for i = 1, . . . , m 4 i + 3 γ −2 i−1 β−1 β ≤ ‖bi‖/λi(L) ≤ γ 2 m−i β−1 β i + 3 4 where γβ is the Hermite constant. For β = 3 we establish the optimal upper bound ‖b1‖/λ1(L) ≤ ( 3 2 )m−1 2 −1 and we present block Korkin–Zolotarev lattice bases for which this bound is tight. We improve the Nearest Plane Algorithm of Babai (1986) using block Korkin–Zolotarev bases. Given a block Korkin–Zolotarev basis b1, . . . , bm with block size β and x ∈ L(b1, . . . , bm) a lattice point v can be found in time β satisfying ‖x−v‖2 ≤ mγ 2m β−1 β minu∈L ‖x− u‖2.