An article about the underlying math with a very accessible introduction (using lots of illustrative graphs) can be found on Arxiv: ”Scattering Amplitudes and the Positive Grassmannian” by N. Arkani-Hameda
at al http://arxiv.org/pdf/1212.5605v1.pdf
An article about the underlying math with a very accessible introduction (using lots of illustrative graphs) can be found on Arxiv:
”Scattering Amplitudes and the Positive Grassmannian” by N. Arkani-Hameda at al http://arxiv.org/pdf/1212.5605v1.pdf
Thanks!