Contents of Number 1
Volume 181 / 2026
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Non-Hausdorff $T_1$ properties Colloquium Mathematicum 181 (2026) , 1-16 MSC: Primary 54D10 DOI: 10.4064/cm9556-4-2026
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An optimal estimate for martingale transforms Colloquium Mathematicum 181 (2026) , 17-40 MSC: Primary 60G42; Secondary 60G46 DOI: 10.4064/cm9708-4-2026
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The Reidemeister zeta functions and the Gauss congruences for the Reidemeister numbers Colloquium Mathematicum 181 (2026) , 41-61 MSC: Primary 37C25; Secondary 37C30, 20E45, 55M20 DOI: 10.4064/cm9590-12-2025
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Constructions of Rota–Baxter operators by L-R smash products Colloquium Mathematicum 181 (2026) , 63-83 MSC: Primary 16T05; Secondary 17B38 DOI: 10.4064/cm9730-3-2026
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On zero-sum subsequences over finite abelian groups of length not exceeding a given number Colloquium Mathematicum 181 (2026) , 85-115 MSC: Primary 11B75; Secondary 11R27 DOI: 10.4064/cm9599-7-2026
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Hopf algebra structures on free unitary extended Rota–Baxter algebras Colloquium Mathematicum 181 (2026) , 117-137 MSC: Primary 16W99; Secondary 17B38 DOI: 10.4064/cm9795-2-2026
