Amplituhedron facet-colooplessness conjecture

About 6 years old · traced to

Let Sπ(1)S_{\pi^{(1)}} and Sπ(2)S_{\pi^{(2)}} be positroid cells in Grk,n+Gr^+_{k,n} corresponding to coloopless permutations π(1)\pi^{(1)} and π(2)\pi^{(2)}, with

dim⁡Zπ(1)∘=dim⁡Zπ(2)∘=2k\dim Z^\circ_{\pi^{(1)}}=\dim Z^\circ_{\pi^{(2)}}=2k

and Zπ(1)∩Zπ(2)=Zπ(3)Z_{\pi^{(1)}}\cap Z_{\pi^{(2)}}=Z_{\pi^{(3)}}, where Sπ(3)⊂Grk,n+S_{\pi^{(3)}}\subset Gr^+_{k,n} and dim⁡Zπ(3)∘=2k−1\dim Z^\circ_{\pi^{(3)}}=2k-1. Amplituhedron facet-colooplessness conjecture. The permutation π(3)\pi^{(3)} is coloopless. This would ensure that common facets of top-dimensional amplituhedron cells remain in the domain of T-duality.

References

Primary source

Tomasz Lukowski, Matteo Parisi and Lauren K. Williams, “The positive tropical Grassmannian, the hypersimplex, and the m=2 amplituhedron”, arXiv:2002.06164 (2021).

Progress summary

Never refreshed

Nothing recorded yet. Refresh searches the literature and the public web for attempts on this problem, and writes the first summary here.

Solutions 0

No solutions have been posted yet.