 Song He (source code)

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= Song He
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<Song He>, with <Freddy Cachazo> and <Ellis Ye Yuan>, established <KLT orthogonality> for objects built from solutions of the <scattering equations>. The orthogonality uses a specified <bilinear form>, not an arbitrary Euclidean inner product.<Scattering Equations and KLT Orthogonality by Freddy Cachazo and others>[Abstract and KLT-orthogonality proof]{ref}

This relates alternative organizations of particle-scattering data while keeping the momentum constraints explicit.

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