2026-10-15T01:03:35Z https://www.scidb.cn/oai

10.57760/sciencedb.32721 2025-12-02T18:13:54Z

2025-12-02 A Supporting Dataset for "Multi-scale Process Cyclicity in the Decimal Expansion of π" doi:10.57760/sciencedb.32721 en This dataset supports the research article "A Discovery of Multi-scale Process Cyclicity in the Decimal Expansion of π: Evidence from Spectral Analysis". It contains two key components:1. The first 100,000 decimal digits of π as a continuous digit string (file: pi_first_100k_digits.txt).2. A summary table of spectral analysis results identifying three significant periodicities at 2, 19.1, and 244.2-digit periods (file: spectral_peaks_summary.csv).The data demonstrates the existence of multi-scale cyclic structures ("process cyclicity") within π's digit sequence, challenging conventional views of π as a purely random normal number. Pi (π); Decimal Expansion; Spectral Analysis; Fast Fourier Transform (FFT); Periodicity Detection; Number Theory; Process Cyclicity; Digital Sequence Wenju Fu PUBLIC https://creativecommons.org/licenses/by/4.0/ dataset Science Data Bank