学术报告报告人:南基洙教授(大连理工大学)题目:The transfer in modular invariant theory of orthogonal groups时间:2014年11月8日(周六) 9:30-10:30地点：数学系（致远楼）107欢迎广大师生参加数学系、数学

学术报告报告人:王颖教授(大连理工大学)题目:无限维李超代数的若干结果介绍时间:2014年11月8日(周六) 10:30-11:30地点：数学系（致远楼）107欢迎广大师生参加数学系、数学

we study a multi-agent scheduling problem on two identical machines In this paper,. Each agent aims at minimizing the makespan. We present a -approximation algorithm which produces a schedule such that the makespan of th-th completed agent is no more tha times its minimum makespan, This ratio vector is tight.

Let and be two independent fractional Brownian motions with respective indices and. In this paper, we consider their intersection local time and show that is differentiable in the spatial variable if. We introduce the so-calledhybrid quadratic covariation When, we construct a Banach spaceof measurable functions such that the quadratic covariation exists in and for all. Whena similar result is proved to hold for all Hölder functions of order

We consider pricing of exotic variance swaps and timer option written on the discretely sampled realized variance of an underlying asset under stochastic volatility models. Timer options are barrier style options in the volatility space. A typical timer option is similar to its European vanilla counterpart, except with uncertain expiration date. The finite-maturity timer option expires either when the accumulated realized variance of the underlying asset has reached a pre-specified level or on the mandated expiration date, whichever comes earlier. Thanks to the analytical tractability of the joint moment generating functions of the affine models, we manage to derive closed form analytic formulas for variance swap products with corridor features.

学术报告报告人:郁培教授(加拿大西安大略大学)题目： Impact of Delay on HIV-1 Dynamics of Fighting a Virus with Another Virus时间：2014年10月28日(星期二)上午10：00—11：00地点：致远楼105欢迎各位参加

In this talk, we not only want to decreases the difficulty of constricting the multisplitting of the coefficient matrix, but also release the constrains to the weighting matrices. We present two optimization models to modify parallel multisplitting iteration methods for solving positive definite (Hermitian or non-Hermitian) linear systems.

对于对称矩阵特征值问题， 我们详细而深入地讨论了块最速下降方法的多项式预处理 及其相应的收敛性质；提出了修正雅可比共轭预处理梯度方法，并研究了其代数性质和数 值行为。