3 papers
math.CO2026
A Hopf algebra on permutations with a coupling product
Huilan Li, Yishuo Yang, Nantel Bergeron
We define a coupling product and a draw coproduct on permutations and show that they define a graded, connected, cocommutative, free Hopf algebra . In characteristic z…
cs.CV2026
An Approach for Thyroid Nodule Analysis Using Thermographic Images
J. R. González, É. O. Rodrigues, C. P. Damião +6
Thyroid cancer is said to be the second most common type of cancer in female individuals and the third in males by 2030, according to projections. In general, detecting cancer in i…
math.NT2012
Permanents, Determinants, Weighted Isobaric Polynomials and Integer Sequences
Huilan Li, Trueman MacHenry
In this paper we construct two types of Hessenberg matrices with the properties that every weighted isobaric polynomial (WIP) appears as a determinant of one of them, and as the pe…