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math.AG2025
Linear embeddings of grassmannians and ind-grassmannians
Ivan Penkov, Valdemar Tsanov
By a grassmannian we understand a usual complex grassmannian or possibly an orthogonal or symplectic grassmannian. We classify, with few exceptions, linear embeddings of grassmanni…
math.AG2021
Automorphism groups of ind-varieties of generalized flags
Mikhail Ignatev, Ivan Penkov
We compute the group of automorphisms of an arbitrary ind-variety of (possibly isotropic) generalized flags. Such an ind-variety is a homogeneous ind-space for one of the ind-group…