2 citations · 3 across the 5 of their papers we have counts for
5 papers
Strong non-vanishing of cohomologies and strong non-freeness of adjoint line bundles on -Raynaud surfaces
Yongming Zhang
We begin by formally defining n-Tango curves and n-Raynaud surfaces. Our investigation then focuses on the pathological behaviors exhibited by n-Raynaud surfaces. As a direct corol…
The -very ampleness of adjoint line bundles on quasi-elliptic surfaces
Yongming Zhang
In this paper, we give a numerical criterion of Reider-type for the -very ampleness of the adjoint line bundles on quasi-elliptic surfaces, and meanwhile we give a new proof of…
Counterexamples to Fujita's conjecture on surfaces in positive characteristic
Yi Gu, Lei Zhang, Yongming Zhang
We present counterexamples to Fujita's conjecture in positive characteristics. Precisely, we show that over any algebraically closed field of characteristic and for any p…
On the stability of tangent bundles on cyclic coverings
Yongming Zhang
Let be a smooth projective surface defined over an algebraically closed field with , and let be a -cyclic covering branched alon…
On the Simultaneously Generation of Jets of the Adjoint Bundles
Junchao Shentu, Yongming Zhang
In this paper, we investigate the problem of simultaneously generations of -jets of when is ample and base point free. It turns out that in this c…