Pointed racks and their applications to braid theory.

Λεπτομέρειες βιβλιογραφικής εγγραφής
Τίτλος:	Pointed racks and their applications to braid theory.
Συγγραφείς:	Apollos, Angel¹ (AUTHOR) aapoll2@lsu.edu, Ceniceros, Jose² (AUTHOR) jcenicer@hamilton.edu
Πηγή:	Journal of Knot Theory & Its Ramifications. Aug2026, p1. 17p.
Θεματικοί όροι:	Braid group (Knot theory), Representations of groups (Algebra), Matrices (Mathematics), Representation theory, *Knot theory
Περίληψη:	We introduce a new algebraic structure called a pointed rack and use it to explicitly construct linear representations of the braid group Bn. By tracking the propagation of colorings through braid crossings, we define a rack counting matrix that acts as a set-theoretic permutation representation on the space of rack colorings. We prove that this matrix invariant not only recovers the classical rack coloring invariant of the braid’s closure but also captures strictly finer off-diagonal structural information of the braid. We demonstrate this by distinguishing braids whose closures have the same classical rack invariant. [ABSTRACT FROM AUTHOR]
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