253 | On 1-bridge torus knots Choi, Doo Hoo; Ko, Ki-Hyoung*researcher*, On Heegaard splittings and Dehn surgeries of 3-manifolds, and topics related to them, v.1229, pp.19 - 32, 2001 |

254 | On Cochran sequence for classical links Jin, Gyo Taek*researcher*, Proc. Workshops in Pure Math., pp.221 - 227, 1988 |

255 | On dominant rational maps from some surfaces of general type Lee, Yongnam*researcher*; Pirola, Pietro, Workshop on Birational Geometry and Related Topics, Fudan University, 2018-11-08 |

256 | On function fields and deformations of hypersurfaces Lee, Yongnam*researcher*; Pirola, Pietro, Algebraic Geometry in Positive Characteristic and Related Topics, University of Tokyo, 2018-12-18 |

257 | On function fields of general hypersurface sections of Fano 3-folds Lee, Yongnam*researcher*; Pirola, Gian Pietro, The Shokurovs: workshop for birationalists, POTECH, IBS, 2017-12-22 |

258 | On function fields of general hypersurface sections of Fano 3-folds and double covers Lee, Yongnam*researcher*; Pirola, Pietro, Workshop in Complex Algebraic Geometry (in honor of Gian Pietro Pirola on the occasion of his 60th birthday), University of Barcelona, 2018-02-07 |

259 | On generalization of property Np to noncomplete embedding and Castelnuovo-Mumford regularity. Kwak, Sijong*researcher*, Castelnuovo-Mumford regularity and related topics, 2006-05-11 |

260 | On generalizations of the Erdos-Szekeres problem Holmsen, Andreas F*researcher*, Recent advances in Transversal and Helly-type theorems in Geometry, Combinatorics and Topology, BIRS, Banff, Alberta, Canada, 2012-10-25 |

261 | On Polygonal Words and Doubles of Free Groups Kim, Sang-hyun*researcher*; Wilton, Henry, AMS Special Session on Recent Progress in Geometric Group Theory, San Francisco State University, 2009-04-25 |

262 | On Q-Gorenstein morphisms Lee, Yongnam*researcher*; Nakayama, Noboru, Workshop on higher dimensional algebraic geometry, holomorphic dynamics and their relations, Institute for Mathematical Sciences, 싱가폴국립대학교, 2017-01-10 |

263 | On Q-Gorenstein morphisms and refinement Lee, Yongnam*researcher*; Nakayama, Noboru, Workshop on higher dimensional algebraic geometry, 대만극립대학교, 2017-06-19 |

264 | On Q-Gorenstein morphisms and refinement Lee, Yongnam*researcher*; Nakayama, Noboru, 2017 Fudan-KAIST Joint Workshop on Algebra and Geometry, Fudan University, 2017-06-10 |

265 | On Q-Gorenstein morphisms and refinement 이용남*researcher*; Nakayama, Noboru, SSAG-Seoul Seminars on Algebraic Geometry, III, 서울대학교, 2017-03-10 |

266 | On rational mapa from a hypersurface section of Fano 3-fold and its double cover Lee, Yongnam*researcher*; Pirola, Gian Pietro, Vietnam-Korea workshop on selected topics in mathematics, Institute of Mathematics, Hanoi, 2017-02-20 |

267 | On rational maps from a hyperplane section of a Fano 3-fold and its double cover Lee, Yongnam*researcher*, Workshop on arithmetic and geometry, University of Bayreuth and Scuola Normale Superiore, 2016-08-27 |

268 | On rational maps from the product of two general curves 이용남*researcher*; Pirola, Pietro, Algebraic Geometry in Gunsan, KIAS, 2018-05-29 |

269 | On some singularly perturbed nonlinear elliptic systems 변재형*researcher*, POSTECH-NCTS Joint Workshop on PDEs, POSTECH, 2013-10-17 |

270 | On subfields of the function field of a general surface in P^3 Lee, Yong Nam*researcher*; Pirola, Gianpietro, Workshop on Higher Dimensional Algebraic Geometry, National Taiwan University, 2015-08-19 |

271 | On subfields of the function field of a general surface in P^3 Pirola, Gianpietro; Lee, Yong Nam*researcher*, INdAM Italian-Korean Meeting on Algebraic Geometry 2015, INdAM, 2015-06-30 |

272 | On the class $M$ as an $F$-algebra Hong Oh Kim*researcher*, 대한수학회, pp.119 - 128, 1987-07-01 |