S. R. Slings, Critical notes on Plato’s Politeia

Notes on S - Matrix of Non - critical N = 2 String

In this paper we discuss the scattering S-matrix of non-critical N = 2 string at tree level. First we consider the ĉ < 1 string defined by combining the N = 2 time-like linear dilaton SCFT with the N = 2 Liouville theory. We compute three particle scattering amplitudes explicitly and find that they are actually vanishing. We also find an evidence that this is true for higher amplitudes. Next we...

Notes on dual-critical graphs

We define dual-critical graphs as graphs having an acyclic orientation, where the indegrees are odd except for the unique source. We have very limited knowledge about the complexity of dual-criticality testing. By the definition the problem is in NP, and a result of Balázs and Christian Szegedy [11] provides a randomized polynomial algorithm, which relies on formal matrix rank computing. It is ...

▲ ❡ ♥♦♠❜r ❡ ❞ ❡ s✉❥❡ts ❞❛♥s ❧❡s ♣❛♥❡❧s ❞✬❛♥❛❧s ❡ s❡♥s♦r✐❡❧❧ ❡ ✿ ✉♥ ❡ ❛♣♣r♦❝❤ ❡ ❜❛s ❡ ❞ ❡ ❞♦♥♥é❡s

Politeia 104 corr:politeia

Sustainable development requires the decoupling of economic growth from environmental impacts and from the use of natural resources. This article gives an overview of existing approaches to using Information and Communication Technology (ICT) in the service of sustainability: Environmental Informatics, Green ICT, and Sustainable Human-Computer Interaction (HCI). These approaches are then discus...

نگاشت های R - s - پیوسته

کلاس جدیدی از نگاشتهای پیوسته، به نام نگاشت های R - s - پیوسته ، معرفی میشود. ارتباط میان R - s - پیوستگی با پیوستگی و انواع دیگری ازپیوستگیهای قوی که تاکنون معرفی شده اند، بررسی میشود. سپس ویژگیهای نگاشتهای R - s - پیوسته مورد مطالعه قرار میگیرد.