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feat: add khinchin

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Hatter Jiang
2025-09-07 15:43:17 +08:00
parent 04c12c2373
commit 21da87c599
1 changed files with 14 additions and 2 deletions
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16
src/main/java/me/hatter/math/util/MathUtil.java
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@@ -6,25 +6,37 @@ import java.math.RoundingMode;
public class MathUtil { public class MathUtil {
// 欧拉数（Euler Number） // 欧拉数（Euler Number）【自然常数、自然底数】
// https://oeis.org/A001113
public static final BigDecimal E = new BigDecimal( public static final BigDecimal E = new BigDecimal(
"2.7182818284590452353602874713526624977572470936999595749669676277240766303535475945713821785251664238" "2.7182818284590452353602874713526624977572470936999595749669676277240766303535475945713821785251664238"
); );
// https://oeis.org/A000796
public static final BigDecimal PI = new BigDecimal( public static final BigDecimal PI = new BigDecimal(
"3.1415926535897932384626433832795028841971693993751058209749445923078164062862089986280348253421170679"); "3.1415926535897932384626433832795028841971693993751058209749445923078164062862089986280348253421170679"
);
// 黄金比例（英语：Golden Ratio），又称黄金比、黄金分割比、黄金分割率
// https://hatter.ink/static/resource/muboard/?id=golden-ratio&version=latest&full=1 // https://hatter.ink/static/resource/muboard/?id=golden-ratio&version=latest&full=1
// https://oeis.org/A001622
public static final BigDecimal PHI = new BigDecimal( public static final BigDecimal PHI = new BigDecimal(
"1.6180339887498948482045868343656381177203091798057628621354486227052604628189024497072072041893911375" "1.6180339887498948482045868343656381177203091798057628621354486227052604628189024497072072041893911375"
); );
// 欧拉-马歇罗尼常数(Euler-Mascheroni constant) // 欧拉-马歇罗尼常数(Euler-Mascheroni constant)
// https://hatter.ink/static/resource/muboard/?id=eulers-constant&version=latest&full=1 // https://hatter.ink/static/resource/muboard/?id=eulers-constant&version=latest&full=1
// https://oeis.org/A001620
public static final BigDecimal GAMMA = new BigDecimal( public static final BigDecimal GAMMA = new BigDecimal(
"0.5772156649015328606065120900824024310421593359399235988057672348848677267776646709369470632917467495" "0.5772156649015328606065120900824024310421593359399235988057672348848677267776646709369470632917467495"
); );
// Khinchin 常数
// https://oeis.org/A002210
public static final BigDecimal KHINCHIN = new BigDecimal(
"2.6854520010653064453097148354817956938203822939944629530511523455572188595371520028011411749318476979"
);
public static final BigDecimal LITTLE_NUMBER = new BigDecimal( public static final BigDecimal LITTLE_NUMBER = new BigDecimal(
"0.000000000000000000000000000000000000000001"); "0.000000000000000000000000000000000000000001");