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Presentation
P-21 The delta-unlinking number of algebraically split links
Celebration of Research and Creative Scholarship
  • Jeannelle Green, Andrews University
  • Gabriel Palacios, Andrews University
  • Moises Reyes, Andrews University
  • Noe Reyes Rivas, Andrews University
  • Anthony Bosman, Andrews University
Presenter Status
Student
Second Presenter Status
Student
Third Presenter Status
Student
Fourth Presenter Status
Student
Fifth Presenter Status
Assistant Professor of Mathematics
Preferred Session
Poster Session
Location
Buller Hall Hallways
Start Date
22-10-2021 2:00 PM
End Date
22-10-2021 3:00 PM
Disciplines
Presentation Abstract

It is known that algebraically split links (links with vanishing pairwise linking number can be transformed into the trivial link by a series of local moves on the link diagram called delta-moves; we define the delta-unlinking number to be the minimum number of such moves needed. This generalizes the notion of delta-unknotting number, defined to be the minimum number of delta-moves needed to move a knot into the unknot. While the delta-unknotting number has been well-studied and calculated for prime knots, no prior such analysis has been conducted for the delta-unlinking number. We prove a number of lower and upper bounds on the delta-unlinking number, relating it to classical link invariants including unlinking number, 4-genus, and Arf invariant. This allows us to determine the precise value of the deltaunlinking number for algebraically split prime links with up to 9 crossings as well as determine the 4-genus for most of these links.

Citation Information
Jeannelle Green, Gabriel Palacios, Moises Reyes, Noe Reyes Rivas, et al.. "P-21 The delta-unlinking number of algebraically split links" (2021)
Available at: http://works.bepress.com/anthony-bosman/35/