I ❤️ puzzles. Sudoku, Wordle, geometry. But off and on, I try to improve my guess about a field theory of elementary particles with gravity:
• Background is Foreground
• ∃ only one field, the continuous metric gₘₙ
• 3+1D spacetime like 🧀
• Causality & stress energy emerge
• Like Feynman diagrams
• Principal Null Geodesic PNGs are boundaries
• 10 gₘₙ(t,x,y,z), 40 ∂s, 100 ∂∂s
• PDEs say given curves are PNG
• ∃ gₘₙ⇔given paths are possible