Titlebook: Combinatorial Aspects of Scattering Amplitudes; Amplituhedra, T-dual Matteo Parisi Book 2023 The Editor(s) (if applicable) and The Author(s

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Biology of Repair of the Immature Skeleton,ch is the moment map image of the positive Grassmannian . and has nice combinatorics in connection with matroid theory and tropical geometry. The second is the . . .—a 2.-dimensional semialgebraic set in . which is the image of the positive Grassmannian . under a linear map induced by a totally posi

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Fractures in Pediatric Growth Disorders,sitroid cells . under .. If such images have pair-wise disjoint interior, cover . and are full-dimensional, then we call their collection . a .. If . is also injective on each cell ., then . is a ., and each . is a .. When . is the moment map, then . are ., so a positroid tiling of the hypersimplex

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The Child with Multiple Injuries,ee-level scattering amplitudes in momentum space can be obtained from a contour integral over collections of .-dimensional positroid cells of .. On the other side, in momentum twistor space, one has collections of 4.-dimensional positroid cells of .. While the latter collections were conjectured to

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978-3-031-41071-0The Editor(s) (if applicable) and The Author(s), under exclusive license to Springer Nature Switzerl