Non-planar BCFW Grassmannian geometries by Shruti Paranjape, Jaroslav Trnka, Minshan Zheng

“…We show that these terms can be interpreted as dlog forms on the non-planar Grassmannian geometries, generalizing the cells of the positive Grassmannian G +(k, n) to a larger class of objects which live in G(k, n). …”
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Poles at infinity in on-shell diagrams by Taro V. Brown, Umut Oktem, Jaroslav Trnka

“…In the dual formulation, they are associated with cells of the positive Grassmannian G +(k, n) and the on-shell functions can be reproduced as canonical differential forms. …”
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