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Warsaw Algebraic Topology Seminar
Tuesday, 16:30–17:30 (CET)
Each Tuesday at Zoom  

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International Polyhedral Products Seminar
Thursday, 10:30–11:30 am (USA Eastern Time) 16:30–17:30 (CET)
Selected Thursdays at Zoom

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Princeton Algebraic Topology Seminar 
Thursday, 1:00–2:00 pm (USA Eastern Time) 19:00–20:00 (CET)
Each Thursday at Zoom