Published or Accepted Papers (Mathematics)
M. Sawahara, Cylindrical ample divisors on Du Val del Pezzo surfaces, Forum Math. 37 (2025), 1597--1619.
DOI: 10.1515/forum-2024-0279 (arXiv:2304.12755)
M. Sawahara, Minimal compactifications of the affine plane with only star-shaped singularities, Taiwanese J. Math. 29 (2025), 425--447.
DOI: 10.11650/tjm/250202 (arXiv:2408.07987)
M. Sawahara, Cylinders in canonical del Pezzo fibrations, Ann. Inst. Fourier 74 (2024), 1--69.
DOI: 10.5802/aif.3573 (arXiv:2012.10062)
M. Sawahara, Minimal compactifications of the affine plane with nef canonical divisors, Comm. Algebra 52 (2024), 2185--2204.
DOI: 10.1080/00927872.2023.2285919 (arXiv:2304.12756)
M. Sawahara, Notes on cylinders in smooth projective surfaces, Geom. Dedicata 217 (2023), No. 6, 14pp.
DOI: 10.1007/s10711-022-00741-3 (arXiv:2204.08864)
M. Sawahara, Cylinders in weak del Pezzo fibrations, Transform. Groups 28 (2023), 413--437.
DOI: 10.1007/s00031-022-09730-y (arXiv:1912.09016)
M. Sawahara, Compactifications of the affine plane over nonclosed fields, Pacific J. Math. 321 (2022), 375--413.
DOI: 10.2140/pjm.2022.321.375 (arXiv:2107.08730)
Preprints
I.-K. Kim, D.-W. Lee and M. Sawahara, Rationality and cylindricity of k-forms of singular del Pezzo surfaces, arXiv:2512.20134 (2025), 22pp.
J. Kim, D.-W. Lee and M. Sawahara, Cylinders in Du Val del Pezzo surfaces of degree one with Picard rank two, arXiv:2512.01285 (2025), 25pp.
M. Sawahara, Polarized cylinders in Du Val del Pezzo surfaces of degree two, arXiv:2412.09848v2 (2024), 30pp.
Doctoral thesis
Cylinders in normal surfaces over algebraically non-closed fields with an application to cylindricity of del Pezzo fibrations, Saitama University, 2022.
DOI: 10.24561/00019786
Master's thesis
Cylinders in weak del Pezzo fibrations, Saitama University, 2019. (in Japanese)
Other papers (in Japanese)
Refereed Papers
Y. Tanimoto, K. Sato and M. Sawahara, "Quantitative study of temperature change in cooking study", Stud. Tohoku Home Econ. Educ. 23 (2025), 25--31.
Departmental Bulletin Papers
Y. Tanaka, K. Yoshikawa, H. Hayakawa, H. Nakano, F. Tensaka, M. Sawahara, M. Yamamoto and S. Itoh, "Development of Spatial Graphic Teaching Materials Emphasizing the Process of Reformulation: Focusing on Approximating the Bulge of the Milk Carton", Bull. Fac. Educ. Hirosaki Univ. 131 (2024), 29--39.
Last update: Dec. 24, 2025