### Preprints

 The elliptic modular surface of level 4 and its reduction modulo 3 pdf An even extremal lattice of rank 64 pdf Rational double points on Enriques surfaces pdf On Edge's correspondence associated with $\cdot 222$ pdf On an Enriques surface associated with a quartic Hessian surface pdf Connected components of the moduli of elliptic K3 surfaces pdf On a smooth quartic surface containing 56 lines which is isomorphic as a K3 surface to the Fermat quartic (joint work with Tetsuji Shioda) pdf Automorphisms of supersingular K3 surfaces and Salem polynomials pdf Holes of the Leech lattice and the projective models of K3 surfaces pdf The automorphism groups of certain singular K3 surfaces and an Enriques surface pdf An algorithm to compute automorphism groups of K3 surfaces and an application to singular K3 surfaces pdf On the topology of projective subspaces in complex Fermat varieties (joint work with Alex Degtyarev) pdf On the supersingular K3 surface in characteristic 5 with Artin invariant 1 (joint work with Toshiyuki Katsura and Shigeyuki Kondo) pdf The graphs of Hoffman-Singleton, Higman-Sims, McLaughlin, and the Hermitian curve of degree 6 in characteristic 5 pdf On Ballico-Hefez curves and associated supersingular surfaces (joint work with Hoang Thanh Hoai) pdf On certain duality of Neron-Severi lattices of supersingular K3 surfaces and its application to generic supersingular K3 surfaces (joint work with S. Kondo) pdf The automorphism group of a supersingular K3 surface with Artin invariant 1 in characteristic 3 (joint work with S. Kondo) pdf A note on rational normal curves totally tangent to a Hermitian variety pdf Projective models of the supersingular K3 surface with Artin invariant 1 in characteristic 5 pdf On Frobenius incidence varieties of linear subspaces over finite fields pdf Primitivity of sublattices generated by classes of curves on an algebraic surface (joint work with N. Takahashi) pdf Topology of curves on a surface and lattice-theoretic invariants of coverings of the surface pdf Lattice Zariski k-ples of plane sextic curves and Z-splitting curves for double plane sextics pdf Generalized Zariski-van Kampen theorem and its application to Grassmannian dual varieties pdf Zariski-van Kampen method and transcendental lattices of certain singular K3 surfaces (joint work with K. Arima) pdf Non-homeomorphic conjugate complex varieties pdf On arithmetic Zariski pairs in degree 6 pdf Transcendental lattices and supersingular reduction lattices of a singular K3 surface pdf On normal K3 surfaces pdf Unirationality of certain supersingular K3 surfaces in characteristic 5 (joint work with Duc Tai Pho) pdf Dynkin diagrams of rank 20 on supersingular K3 surfaces (joint work with De-Qi Zhang) pdf Dynkin diagrams of rank 20 on supersingular K3 surfaces (joint work with De-Qi Zhang) [detailed version with Table, 45 pages] pdf On Kummer type construction of supersingular K3 surfaces in characteristic 2 (joint work with De-Qi Zhang) pdf Singularities of dual varieties in characteristic 2 pdf Singularities of dual varieties in characteristic 3 pdf K3 surfaces with ten cusps (joint work with De-Qi Zhang) pdf Moduli curves of supersingular K3 surfaces in characteristic 2 with Artin invariant 2 pdf Supersingular K3 surfaces in characteristic 2 as double covers of a projective plane pdf Supersingular K3 surfaces in odd characteristic and sextic double planes pdf Rational double points on supersingular K3 surfaces pdf Vanishing cycles, the generalized Hodge Conjecture and Groebner bases pdf The fundamental group of the complement of a resultant hypersurface pdf Equisingular families of plane curves with many connected components pdf Lattices of algebraic cycles on Fermat varieties in positive characteristics pdf On elliptic K3 surfaces pdf On elliptic K3 surfaces [with Table, 110 pages] pdf Classification of extremal elliptic K3 surfaces and fundamental groups of open K3 surfaces (joint work with De-Qi Zhang) pdf