談話会情報

# 筑波大学数学談話会

日時 | 2013年11月7日 |
---|---|

場所 | 自然系学系棟Ｄ５０９ |

講演者 | 大本亨 氏 （北海道大学） |

講演題目 |
`Image and discriminant Chern classes of stable maps` |

概要 |
```
In classical algebraic geometry,
numerical characters of projective varieties
were extensively studied by means of enumerating
singular points of naturally associated maps.
A modern unified approach to such enumerative problems
is the theory of Thom polynomials based on
the classification of singularities of maps (Thom-Mather theory).
In this talk I will introduce a new branch of the theory,
in which we replace counting singular points
by computing (weighted) Euler characteristics.
In particular, I will talk about a universal formula
on (singular) Chern class of image varieties of maps.
``` |