Home /  Left-orderability in Dehn fillings of pseudo-Anosov mapping tori

Seminar

Left-orderability in Dehn fillings of pseudo-Anosov mapping tori February 25, 2026 (11:00 AM PST - 12:00 PM PST)
Parent Program:
Location: SLMath: Eisenbud Auditorium, Online/Virtual
Speaker(s) Bojun Zhao (Université du Québec à Montréal)
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Keywords and Mathematics Subject Classification (MSC)
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Video

Left-orderability in Dehn fillings of pseudo-Anosov mapping tori

Abstract/Media

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For pseudo-Anosov mapping tori with co-orientable invariant foliations and monodromies reversing their co-orientations, it was previously shown that taut foliations exist on Dehn fillings with all rational slopes outside a neighborhood of the degeneracy slope. In this talk, we prove that all such Dehn fillings have left-orderable fundamental groups. As an application, combining this with other work in the literature, we verify the L-space conjecture for all surgeries on the $(-2,3,2k+1)$-pretzel knot with $k \geqslant 3$.

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Left-orderability in Dehn fillings of pseudo-Anosov mapping tori