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math.AG2019
Galois Groups of Composed Schubert Problems
Frank Sottile, Robert Williams, Li Ying
Two Schubert problems on possibly different Grassmannians may be composed to obtain a Schubert problem on a larger Grassmannian whose number of solutions is the product of the numb…
math.AG2019
Classification of Schubert Galois groups in Gr(4,9)
Abraham Martin del Campo, Frank Sottile, Robert Williams
We classify Schubert problems in the Grassmannian of 4-planes in 9-dimensional space by their Galois groups. Of the 31,806 essential Schubert problems in this Grassmannian, there a…
math.AG2017★ 2 cited
Restrictions on Galois groups of Schubert problems
Robert Williams
The Galois group of a Schubert problem encodes some structure of its set of solutions. Galois groups are known for a few infinite families and some special problems, but what permu…