Degeneration of ALF Dn metrics

Degeneration of ALF D n Metrics

Beginning with the Legendre transform construction of hyperkähler metrics, we analyze the ALF version of the D n metrics. We determine the constraint equation obtained from extremizing the w coordinate of the generating function F (z, ¯ z, u, ¯ u, w) and study its behavior as we send two of the mass parameters of the D n metric to zero. We find that the constraint equation enforces the limit th...

ITP-SB-98-72 ANL-HEP-PR-98-140 hep-th/yymmddd Degeneration of ALF Dn Metrics

Beginning from the Legendre transform construction of hyperkähler metrics, we analyze the ALF version of the D n metrics. We determine the constraint equation obtained from extremizing the w coordinate of the generating function F (z, ¯ z, u, ¯ u, w) and study its behavior as we send two of the mass parameters of the D n metric to zero. We find that the constraint equation enforces the limit th...

Length Spectra and Degeneration of Flat Metrics

In this paper we consider flat metrics (semi-translation structures) on surfaces of finite type. There are two main results. The first is a complete description of when a set of simple closed curves is spectrally rigid, that is, when the length vector determines a metric among the class of flat metrics. Secondly, we give an embedding into the space of geodesic currents and use this to get a bou...

Impact of ALF on Communication

The lack of exibility and eeciency of the traditional layered model has led researchers to consider new approaches when designing communication subsystems. In particular, one approach consists of implementing protocol subsystems tailored to application requirements. The Application Level Framing concept in which the communication subsystem is able to process data in chunks of application-specii...

Consistency in ALF ( Draft )