Lagrangian Translating Solitons and Special Lagrangians in ${\mathbb{C}}^m$ with Symmetries

We construct novel families of exact immersed and embedded Lagrangian translating solitons and special Lagrangian submanifolds in ${\mathbb{C}}^m$ that are invariant under the action of various admissible compact subgroups $G\le \text{SU}(m-1)$ with cohomogeneity-two. These examples are obtained via an Ansatz generalising a construction of Castro-Lerma in ${\mathbb{C}}^2$. We give explicit examples of admissible group actions, including a full classification for $G$ simple. We also describe novel Lagrangian translators symmetric with respect to non-compact subgroups of the affine special unitary group $\text{SU}(m)⋉{\mathbb{C}}^m$, including cohomogeneity-one examples.