How to accomplish inflation and a constant dark energy density
  It is commonly assumed that the Lagrangian of multi-field theories of gravity
contains the sum of kinetic terms of scalar fields. However, we propose here
the Lagrangian contains not the sum but the quotient of kinetic terms. With
this novel change, we find the inflationary universe can be acquired with two
scalars without the slow-roll approximation. On the other hand, a constant dark
energy density can also be achieved with two scalars while without the need of
Einstein cosmological constant.
