17 citations · 105 across the 28 of their papers we have counts for
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math.AG2018★ 1 cited
On ruled surfaces with big anti-canonical divisor and numerically trivial divisors on weak log Fano surfaces
Rikito Ohta, Shinnosuke Okawa
We investigate the structure of geometrically ruled surfaces whose anti-canonical class is big. As an application we show that the Picard group of a normal projective surface whose…
math.AG2018★ 4 cited
An example of birationally inequivalent projective symplectic varieties which are D-equivalent and L-equivalent
Shinnosuke Okawa
We give an example of a pair of projective symplectic varieties in arbitrarily large dimensions which are D-equivalent, L-equivalent, and birationally inequivalent.