  We study inflationary solutions in the M-theory. Including the fourth-order
curvature correction terms, we find three generalized de Sitter solutions, in
which our 3-space expands exponentially. Taking one of the solutions, we
propose an inflationary scenario of the early universe. This provides us a
natural explanation for large extra dimensions in a brane world, and suggests
some connection between the 60 e-folding expansion of inflation and TeV gravity
based on the large extra dimensions.

High Energy Physics - Theory;Astrophysics;General Relativity and Quantum Cosmology;High Energy Physics - Phenomenology