Take a rectangle of sides A and B.
Its area is A * B.

Let's make it grow by a rate of a and b.
The rectangle area is now defined by:
A * B + b * A + a * b + a * b
Its increment is the remainder :
b * A + a * b + a * b
a * b is neglected in finite elements approaches and calculus.

This difference is where the theory of relativity is erroneous and leads to aberrations such as dark energy.

Foolishly, I will take a risk and suppose that gravitational effects are instead proof of advanced lifeforms able to alter gravity.