IPM Calendar 
Thursday 20 June 2019   Today  
Events for day: Thursday 20 June 2019    
           10:00 - 11:00     Weekly Seminar
The statistical analysis of recurrent episode data


A special case involving multiple event types is when the events correspond to the onset and termination of a relapsing and remitting condition. This setting may be more appropriately characterized as recurrent episodes or alternating states rather than recurrent events, but models and methods similar to those for ordinary recurrent events can be used for analysis. In this talk, I briefly describe standard analysis for recurrent episode data. In addition, by using some real examples, I explain common issues when we ignore characteristics of such data. ...

           11:00 - 12:00     Theory Weekly Seminar(TWS)
The Unexpected Effectiveness of Perturbation Theory


Abstract: In 1952, Dyson was the first to point out that the perturbative expansions in QFTs are not convergent and have the form of an asymptotic expansion.
While Abel thought of the asymptotic series as the invention of the devil, we will show how the fact that these perturbative expansions are asymptotic would help us to extract non-perturbative information from the perturbation theory.
In this talk, I will use a geometrical approach based on the Picard-Lefschetz theory to characterize the conditions under which perturbative expansions lead to exact results. Then, following the approach of 1702.04148, I will show that even wh ...

           14:00 - 16:00     Mathtematical Logic Weekly Seminar
Talking About the Sentences that Talk About Themselves!


Talking about oneself is natural in natural languages. But it can be ambiguous or can cause difficulties in formal languages. For example, the following sentence Ax Ey (x=2y ˅ x=2y+1) says that every number is either odd or even. But how can a sentence talk about itself? Gdel had the opinion that if the biconditional φ ↔ Ψ(#φ) holds, where #φ is the Godel code of φ, then φ says about itself that it has the Ψ property. In this talk, we will discuss on this interpretation and will give some mathematical arguments for some philosophical discussions on the truth or falsity of Gdelean sen ...