2 papers
math.CO2025
Permutations with only reduced co-BPDs
Joshua Arroyo, Adam Gregory
Bumpless pipe dreams (BPDs) are combinatorial objects used in the study of Schubert and Grothendieck polynomials. Weigandt recently introduced a co-BPD object associated to each BP…
math.CO2022
Lenart's bijection via bumpless pipe dreams
Adam Gregory, Zachary Hamaker
Pipe dreams and bumpless pipe dreams for vexillary permutations are each known to be in bijection with certain semistandard tableaux via maps due to Lenart and Weigandt, respective…