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Beatty Sequences Calculator

Free online beatty sequences calculator. Enter your values and get instant results with the formula, step-by-step working, a worked example and FAQs — everything runs locally in your browser on Calcton, no signup required.

中文版:贝蒂数列在线计算器

Beatty Sequences Calculator
无理数 α(> 1 且非整数)
项数 N(1 ≤ N ≤ 500)

原理:Beatty 定理(1926):若 α、β 为正无理数且 1/α + 1/β = 1(即 β = α/(α−1)),则两个数列 ⌊nα⌋ 与 ⌊nβ⌋ 恰好无重叠、无遗漏地划分全体正整数——每个正整数在两列中出现且只出现一次。最著名的例子取 α = 黄金比 φ:φ² = φ + 1 使 β = φ²,于是 ⌊nφ⌋(下 Wythoff 数列)与 ⌊nφ²⌋(上 Wythoff 数列)分掉全体正整数,这正是 Wythoff 取子游戏的必胜策略基础。

步骤:输入 α 与项数 N,生成 A、B 两列的前 N 项;程序自动验证前 min(N,50) 项内两列并集无重叠覆盖 [1, ⌊Nα⌋]。

示例:α = φ = 1.618033988750 时 β = 2.618033988750,A 前 5 项 = 1, 3, 4, 6, 8,B 前 5 项 = 2, 5, 7, 10, 13,⌊10φ⌋ = 16;验证 1/φ + 1/φ² = 1.000000000000。取 α = √2 时 β = 3.414213562374(即 2 + √2)。

注意事项:α 必须是无理数且大于 1——整数 α 会使两列大量重叠;α 过于接近 1 时 β 巨大、验证区间内 B 项过少。浮点精度限制 N ≤ 500。

相关:黄金比 1.618033988750;β = 2.618033988750;⌊10φ⌋ = 16。

How to use the Beatty Sequences Calculator

  1. Fill in the inputs with your own numbers — every field shows what it expects.
  2. The result updates instantly as you type; no "Calculate" click needed.
  3. Read the result card for the main figure, the step-by-step formula, and practical notes.

Frequently asked questions

Is the Beatty Sequences Calculator free?

Yes — all math calculators on Calcton are free, with no sign-up required. Your inputs are processed in your browser and never sent to a server.

Is there a Chinese version of this tool?

Yes. Use the Chinese version link above — it is the same calculator with the interface in Simplified Chinese.

References

Formulas and benchmarks used by this calculator follow these published sources.

  1. dlmf.nist.gov
  2. mathworld.wolfram.com
Kevin's profile

KevinContent LeadCalcton Editorial Team · Last updated 2026-10-01

Kevin maintains Calcton's formula verification and content: every calculator cites the standard it implements, worked examples are recomputed programmatically, and health benchmarks follow WHO and international guidelines.

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