In the talk, I sketch a semantical proof of the conjecture of Garcia and Taylor that congruence permutability is a prime Maltsev condition in the lattice of interpretability types of varieties. The proof was obtained jointly with Gyenizse and Maróti, and it is based on a combinatorial property of certain digraph powers. I also discuss how the present proof is related to the proof of our earlier result on the non-primeness of n-permutability when n>4 and some other result that we obtained for 3-permutability.
On the primeness of 2-permutability
Nov. 02, 2021 1:50pm (Zoom)
Math Edu
Karina Uhing (University of Nebraska at Omaha)
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This talk will highlight students’ learning experiences with active learning in Precalculus, Calculus 1 and Calculus 2 courses using data from Phase 1 of the Student Engagement in Mathematics through an Institutional Network for Active Learning (SEMINAL) project. Specifically, I will share how students perceive five elements involved with active learning: interactions with their peers during group work, relationships with instructors, formats of courses, assessment, and their affective experiences while learning. Finally, we will discuss how investigating students’ experiences with active learning can help us better design our courses to engage and motivate students to learn.
Speaker Bio: Dr. Karina Uhing is an Assistant Professor of Mathematics at the University of Nebraska at Omaha. She has worked on the SEMINAL project for the last 4 years. Currently, Dr. Uhing is part of a large-scale effort to improve Quantitative Reasoning courses at UNO. This semester, she is helping to investigate the transition from an emporium to an active learning model in College and Intermediate Algebra and students’ mathematical and emotional experiences in these courses.
Student Experiences with Active Learning in Precalculus Through Calculus 2
Nov. 02, 2021 3pm (On Zoom)
Topology
Cherry Ng (CU Boulder)
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Bredon homology (and its expanded cousin RO(G)-graded homology) are homology theories suitable for computing homotopical invariants of -spaces. Such equivariant homology theories have proved useful and powerful, and they played a role in landmark results such has Hill, Hopkins, and Ravenel's work on manifolds of the Kervaire invariant. In this talk, we will discuss both geometric and algebraic methods used to compute Bredon homology, in particular when is the nonabelian group of order 21.