Two types of birational models

نویسندگان

چکیده

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

the application of multivariate probit models for conditional claim-types (the case study of iranian car insurance industry)

هدف اصلی نرخ گذاری بیمه ای تعیین نرخ عادلانه و منطقی از دیدگاه بیمه گر و بیمه گذار است. تعین نرخ یکی از مهم ترین مسایلی است که شرکتهای بیمه با آن روبرو هستند، زیرا تعیین نرخ اصلی ترین عامل در رقابت بین شرکتها است. برای تعیین حق بیمه ابتدا می باید مقدار مورد انتظار ادعای خسارت برای هر قرارداد بیمه را برآورد کرد. روش عمومی مدل سازی خسارتهای عملیاتی در نظر گرفتن تواتر و شدت خسارتها می باشد. اگر شر...

15 صفحه اول

On the Topology of Birational Minimal Models

In the study of higher dimensional algebraic geometry, an important reduction step is to study certain good birational models of a given algebraic manifold. This leads to the famous “minimal model program” initiated by Mori – the search for birational models with numerically effective canonical divisors and with at most terminal singularities. The existence problem is still completely open in d...

متن کامل

Two Implementation Models of Abstract Data Types

A~-This paper compares two implementation models for abstract data types: direct and indirect implementations. Direct implementations offer relatively cheap execution and expensive compilation costs while indirect implementations result in relatively expensive implementations and cheap compilation costs. These two models are both accommodated by Ada, and a small experiment compares their costs ...

متن کامل

Birational Cobordisms and Factorization of Birational Maps

In this paper we develop a Morse-like theory in order to decompose birational maps and morphisms of smooth projective varieties defined over a field of characteristic zero into more elementary steps which are locallyétale isomorphic to equivariant flips, blow-ups and blow-downs of toric varieties (see Theorems 1, 2 and 3). The crucial role in the considerations is played by K *-actions where K ...

متن کامل

Forcing with Sequences of Models of Two Types

We present an approach to forcing with finite sequences of models that uses models of two types. This approach builds on earlier work of Friedman and Mitchell on forcing to add clubs in cardinals larger than א1, with finite conditions. We use the two-type approach to give a new proof of the consistency of the proper forcing axiom. The new proof uses a finite support forcing, as opposed to the c...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: Commentarii Mathematici Helvetici

سال: 1983

ISSN: 0010-2571,1420-8946

DOI: 10.1007/bf02564644