Ola Amara-Omari

collaborators

2 papers

math.RT2020

Nonrecursive canonical basis computations for low rank Kashiwara crystals of type A

Ola Amara-Omari, Mary Schaps

For symmetric Kashiwara crystals of type $A$ and rank $e = 2$ , and for the canonical basis elements that we call external, corresponding to weights on the outer skin of the Kashiwara…

math.RT2018

External vertices for crystals of type A

Ola Amara-Omari, Mary Schaps

We show that a vertex in the reduced crystal is i-external for a residue i if the defect is less than the absolute value of the i-component of the hub. We demonstrate the existence…