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Biquandle arrow weights (Sam Nelson, CMC)

Davidson Lecture Hall, CMC 340 E 9th St, Claremont, CA

Many knot invariants are defined from features of knot projections such as arcs or crossings. Gauss diagrams provide an alternative combinatorial scheme for representing knots. In this talk we will use Gauss diagrams to enhance the biquandle counting invariant for classical and virual knots using biquandle arrow weights, a new algebraic structure without a clear […]

Numerical semigroups, minimal presentations, and posets (Chris O’Neill, SDSU)

Davidson Lecture Hall, CMC 340 E 9th St, Claremont, CA

A numerical semigroup is a subset S of the natural numbers that is closed under addition. ¬†One of the primary attributes of interest in commutative algebra are the relations (or trades) between the generators of S; any particular choice of minimal trades is called a minimal presentation of S (this is equivalent to choosing a […]