Any proof about the equivalance of between theories of R^4 x M and R^10?

[Osiris]

Here R^4 is a flat 4-dimensional space, and M is a 6-dimensional Calabi-Yau manifold;
and the other side, R^10, is a flat 10-dimensional space.

Is there any careful talk and reference about the equivalence of theories in those two spaces above?


Great thanks.

[Osiris]

What related questions could we ask here?

How about coherent states of gravitons arising from such spaces?