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A geometric object whose volume is conjectured to be related to scattering amplitudes. It is used mostly in string theory.
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Positive geometry and log singularities
In order to define a positive geometry it is a requirement that has to be a logarithmic singularities on the boundaries, for example for an interval (endpoints $a$ and $b$) the canonical form is
$$\fr …
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Differential forms in projective space
I am currently reading some paper about the Amplituhedron, and it is using projective geometric way to present amplitudes. …