<![CDATA[Why Friday the 13th is a mathematical inevitabilitySource : Scientific American / Spektrum der Wissenschaft / Manon Bischoff]]>Why Friday the 13th is a mathematical inevitability
Source : Scientific American / Spektrum der Wissenschaft / Manon Bischoff

https://www.scientificamerican.com/article/why-friday-the-13th-is-a-mathematical-inevitability/
@SciAm

]]>https://board.circlewithadot.net/topic/a80b6aa8-204c-480e-a5b2-89a72687659a/why-friday-the-13th-is-a-mathematical-inevitabilitysource-scientific-american-spektrum-der-wissenschaft-manon-bischoffRSS for NodeMon, 06 Apr 2026 06:47:46 GMTFri, 13 Mar 2026 11:40:43 GMT60