ZFLean: a framework for set-level mathematics in Lean. ~ Vincent Trélat, Matteo Pouillat. arxiv.org/abs/2604.24195

ZFLean: a framework for set-level mathematics in Lean. ~ Vincent Trélat, Matteo Pouillat. arxiv.org/abs/2604.24195
Formally certifying the vertex set of a polyhedron faster than informal enumeration. ~ Xavier Allamigeon, Yazid Id-Sahra, Pierre-Yves Strub. arxiv.org/abs/2610.11913
A Lean~4 framework for the radii polynomial method. ~ Fengyang Wang. arxiv.org/abs/2610.023...
Daily cozy math 🌙 How much is 66 + 64 − 36? Solution step by step in today's video - follow for a new puzzle every day. Free math tools: lern-digital.de #math #mentalmath #cozy
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Problem for October 9th from the 2026 AMS Daily Epsilon of Math Calendar
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Echo 9th October 2026
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9 octobre 1581 : #CeJourLà naissance de Claude-Gaspard Bachet de Méziriac (†26/2/1638), mathématicien et poète français, auteur de récréations mathématiques, traducteur de Diophante.
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I just finished my MAT 117 final with a 94%—only one question wrong. Across four math exams this term, I missed only two questions total. I put a lot of hours into this course, and I’m proud of how that work paid off. ☺️
Outperformance Inverse Optimization: Learning Objective Functions that Outperform Agent Decisions
Akira Kitaoka
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