In joint work with Ben Elias, Nicolas Libedinsky, Leonardo Patimo, we construct a basis of the morphism spacesbetween singular Soergel bimodules, analogous to Elias-Williamson’s diagrammatic basis for the regularSoergel bimodules (modelled on the algebraic ‘light leaves’ due to Libedinsky).
The talk is an introduction to this diagrammatics and related combinatorics, where we also aim to draw some singular light leaves.
