Watson Z. Y. Wang

collaborators

3 papers

math.CO2026

Schur positivity of three-legged spiders

David G. L. Wang, Watson Z. Y. Wang

We give a complete classification of Schur positivity for three-legged spiders. Every spider with at least two even legs is Schur positive, whereas every spider with three odd legs…

math.CO2026

Schur positivity from signed elementary expansions: clique-spiders and spiders $S (a, b, 2)$

David G. L. Wang, Watson Z. Y. Wang

Determining when the chromatic symmetric function of a graph is Schur positive is a central problem in algebraic combinatorics. Elementary expansions can help answer this question,…

math.CO2026

An $e$ -positive classification for complete multipartite graphs

Ariel Y. Sun, David G. L. Wang, Watson Z. Y. Wang

Shelburne and van Willigenburg (arXiv:2604.26158) characterize the Schur-positive complete multipartite graphs and leave open whether the graphs~ $G = K_{(3, 2^{β})}$ are $e$ -positive.…

Schur positivity of three-legged spiders

Schur positivity from signed elementary expansions: clique-spiders and spiders S(a,b,2)

An e-positive classification for complete multipartite graphs

Schur positivity from signed elementary expansions: clique-spiders and spiders $S (a, b, 2)$

An $e$ -positive classification for complete multipartite graphs