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math.AG2026
A natural Chow lemma for smooth threefolds and fourfolds
Parsa Bakhtary
Let be a smooth proper integral variety of dimension at most four over a field of characteristic zero. We construct a finite sequence of blowups along smooth centers with proje…
math.AG2026
Sharp Bounds and Canonical Blow-ups for Toric Projectivization
Parsa Bakhtary
For every dimension , we construct a family of smooth complete fans with Picard number five and fixed combinatorial type. For integers , the minimum numb…