# Tri-vector deformations in $d=11$ supergravity

## TL;DR

This paper develops a supergravity analogue of the open-closed string map using tri-vector deformations in $d=11$ supergravity, enabling efficient TsT deformations and connecting to Yang-Baxter deformations via a generalized CYBE.

## Contribution

It introduces a tri-vector deformation framework in $d=11$ supergravity and generalizes the CYBE to rank 3 objects, linking higher-dimensional supergravity to integrable deformations.

## Key findings

- Constructed a supergravity open-closed map with tri-vector parameter.
- Derived a generalized CYBE for rank 3 objects in $d=11$ supergravity.
- Showed reduction of the generalized CYBE to the $d=10$ CYBE.

## Abstract

We construct a $d=11$ supergravity analogue of the open-closed string map in the context of SL(5) Exceptional Field Theory (ExFT). The deformation parameter tri-vector $\Omega$ generalizes the non-commutativity bi-vector parameter $\Theta$ of the open string. When applied to solutions in $d=11$, this map provides an economical way of performing TsT deformations, and may be used to recover $d=10$ Yang-Baxter deformations after dimensional reduction. We present a generalization of the Classical Yang-Baxter Equation (CYBE) for rank 3 objects, which emerges from $d=11$ supergravity and the SL(5) ExFT. This equation is shown to reduce to the $d=10$ CYBE upon dimensional reduction.