<?xml version="1.0" encoding="UTF-8"?>

<?xml-stylesheet type="text/xsl" href="/static/oaitohtml.xsl"?>

<!--
<?xml-stylesheet type="text/xsl" href="/oaitohtml.xsl"?>
-->

<OAI-PMH xmlns="http://www.openarchives.org/OAI/2.0/" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/ http://www.openarchives.org/OAI/2.0/OAI-PMH.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
    <responseDate>2026-10-12T09:11:20Z</responseDate>
    <request verb="GetRecord" metadataPrefix="oai_dc" identifier="10.57760/sciencedb.34455" >https://www.scidb.cn/oai</request>
<GetRecord>
    <record>
    <header >
    <identifier>10.57760/sciencedb.34455</identifier>
    <datestamp>2025-12-29T12:45:40Z</datestamp>
</header>
    <metadata>
        
<oai_dc:dc xmlns:oai_dc="http://www.openarchives.org/OAI/2.0/oai_dc/" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/oai_dc/ http://www.openarchives.org/OAI/2.0/oai_dc.xsd">
  <dc:date>2025-12-29</dc:date>
  <dc:title>Dataset for Process Cyclicity Analysis of Mathematical Constants (&amp;pi;, e, &amp;radic;2, &amp;phi;)</dc:title>
  <dc:identifier>doi:10.57760/sciencedb.34455</dc:identifier>
  <dc:language>en</dc:language>
  <dc:description>This dataset provides comprehensive materials for studying the &amp;quot;Process Cyclicity&amp;quot; theory through analysis of four mathematical constants: &amp;pi; (pi), e (Euler's number), &amp;radic;2 (square root of 2), and &amp;phi; (golden ratio).## Contents:1. **Digit sequences**:&amp;nbsp;&amp;nbsp;- &amp;pi;: 10,000,000 decimal digits&amp;nbsp;&amp;nbsp;- e: 1,000,000 decimal digits&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;- &amp;radic;2: 1,000,000 decimal digits&amp;nbsp;&amp;nbsp;- &amp;phi;: 1,000,000 decimal digits2. **Analysis results**:&amp;nbsp;&amp;nbsp;- Six-dimensional metrics: Hurst exponent, self-similarity, uniformity, inclusiveness, alternation, hierarchy, and nesting&amp;nbsp;&amp;nbsp;- Key finding: All constants show Hurst exponents significantly greater than 0.5 (range: 0.5266-0.5325), indicating long-term memory3. **Reproducible code**:&amp;nbsp;&amp;nbsp;- Complete Python scripts for all analyses&amp;nbsp;&amp;nbsp;- Simplified version for quick verification4. **Manuscript**:&amp;nbsp;&amp;nbsp;- LaTeX source of the accompanying paper&amp;nbsp;&amp;nbsp;- Key visualization figure## Scientific significance:Demonstrates that mathematical constants exhibit weak but systematic periodic structures (&amp;quot;process cyclicity&amp;quot;) while maintaining statistical randomness in digit distribution.## Data source:Digit sequences extracted from Alexander Yee's number library (http://www.numberworld.org/), computed using y-cruncher software.## Usage:Run `python precise_analysis.py` to reproduce all analyses.</dc:description>
  <dc:subject>mathematical constants; process cyclicity; Hurst exponent; self-similarity; decimal expansion; number theory; computational mathematics</dc:subject>
  <dc:creator>Wenju Fu</dc:creator>
  <dc:rights>PUBLIC</dc:rights>
  <dc:rights>https://creativecommons.org/licenses/by/4.0/</dc:rights>
  <dc:type>dataset</dc:type>
  <dc:publisher>Science Data Bank</dc:publisher>
</oai_dc:dc>

    </metadata>
</record>
</GetRecord>
</OAI-PMH>