# This week

### Tuesday

#### TBA

 at: 15:00 City U.room C305 abstract:

### Wednesday

#### Gauge theories phases of 5d SCFTs: an M-theory/type IIA perpective

Regular Seminar Cyril Closset ()

 at: 14:00 ICroom H503 abstract: I will revisit the well-known construction of 5d SCFTs from M-theory on a CY3 singularity. Upon massive deformation, such 5d SCFTs are often expected to have 5d N=1 supersymmetric gauge theory descriptions at low energy. I will present a new way to study these 5d gauge theory phases'' systematically using type-IIA string theory, and I will comment on the phenomenon of "UV duality." Along the way, I will discuss some slightly subtle properties of the 5d N=1 Coulomb branch prepotential.

#### String theory compactifications with sources

Regular Seminar Alessandro Tomasiello (Universita di Milano-Bicocca)

 at: 13:15 KCLroom S2.49 abstract: In recent years, more and more compactifications have emerged whose existence depends crucially on the presence of internal sources to the supergravity fields, such as D-branes and orientifold planes. I will review some solutions of this type in various dimensions, and illustrate their applications to holography and potentially to the problem of finding de Sitter solutions.

### Thursday

#### How logarithms are born

Regular Seminar Melissa van Beekveld (IMAPP Njimegen)

 at: 14:00 QMWroom G O Jones 610 abstract: I will show how large logarithms arise in a perturbative calculation and how resummation solves the issue of having these large logarithms. If there is some time left, I want to show some recent progress that we have made on pinning down the origin of the next-to-leading class of logarithms.