Infinitesimal moduli for the Strominger system and Killing spinors in generalized geometry

M Garcia-Fernandez, R Rubio, C Tipler - Mathematische Annalen, 2017 - Springer
We construct the space of infinitesimal variations for the Strominger system and an
obstruction space to integrability, using elliptic operator theory. We initiate the study of the …

Exceptional Calabi–Yau spaces: the geometry of backgrounds with flux

A Ashmore, D Waldram - Fortschritte der Physik, 2017 - Wiley Online Library
In this paper we define the analogue of Calabi–Yau geometry for generic, flux backgrounds
in type II supergravity and M‐theory. We show that solutions of the Killing spinor equations …

Ricci flow on Courant algebroids

J Streets, C Strickland-Constable, F Valach - arXiv preprint arXiv …, 2024 - arxiv.org
We develop a theory of Ricci flow for metrics on Courant algebroids which unifies and
extends the analytic theory of various geometric flows, yielding a general tool for …

Holomorphic string algebroids

M Garcia-Fernandez, R Rubio, C Tipler - Transactions of the American …, 2020 - ams.org
We introduce the category of holomorphic string algebroids, whose objects are Courant
extensions of Atiyah Lie algebroids of holomorphic principal bundles and whose morphisms …

Classification of generalized Einstein metrics on three-dimensional Lie groups

V Cortés, D Krusche - Canadian Journal of Mathematics, 2023 - cambridge.org
We develop the theory of left-invariant generalized pseudo-Riemannian metrics on Lie
groups. Such a metric accompanied by a choice of left-invariant divergence operator gives …

The Lie group of automorphisms of a Courant algebroid and the moduli space of generalized metrics

R Rubio, C Tipler - Revista matemática iberoamericana, 2019 - ems.press
We endow the group of automorphisms of an exact Courant algebroid over a compact
manifold with an infinite dimensional Lie group structure modeled on the inverse limit of …

-Generalized Pseudo-Kähler Structures

V Cortés, L David - The Journal of Geometric Analysis, 2023 - Springer
We define the notions of B n-generalized pseudo-Hermitian and B n-generalized pseudo-
Kähler structure on an odd exact Courant algebroid E. When E is in the standard form (or of …

Drinfel'd Doubles, Twists and All That... in Stringy Geometry and M Theory

A Çatal-Özer, K Doğan, C Yetişmişoğlu - arXiv preprint arXiv:2409.11973, 2024 - arxiv.org
Drinfel'd double of Lie bialgebroids plays an important role in T-duality of string theories. In
the presence of $ H $ and $ R $ fluxes, Lie bialgebroids should be extended to proto Lie …

Odd generalized Einstein metrics on Lie groups

V Cortés, L David - Annali di Matematica Pura ed Applicata (1923-), 2025 - Springer
An odd generalized metric\(E_ {-}\) on a Lie group G of dimension n is a left-invariant
generalized metric on a Courant algebroid\(E_ {H, F}\) of type\(B_ {n}\) over G with left …

T-duality for transitive Courant algebroids

V Cortés, L David - arXiv preprint arXiv:2101.07184, 2021 - arxiv.org
We develop a theory of T-duality for transitive Courant algebroids. We show that T-duality
between transitive Courant algebroids E\rightarrow M and\tilde {E}\rightarrow\tilde {M} …