M theory and string theory both have propogators and Feynman diagrams.

The concrete form of the propagators can be easily obtained, since the problem can be mapped onto the problem of finding the propagators for the one-dimensional harmonic oscillator.

See:Becker and Matrix theory as wells as string field theory

M theory and string theory both have propogators and Feynman diagrams.

The concrete form of the propagators can be easily obtained, since the problem can be mapped onto the problem of finding the propagators for the one-dimensional harmonic oscillator.

See:Becker and Matrix theory as wells as string field theory

Also the SO32 closed string is an E8xE8 even lattice.