He "introduced many of the fundamental notions of model theory".

At another point, a similar argument was made that 2 was not a number but a fundamental notion of a pair.

In either approach, the fundamental notion is that of an isotropic subspace 'W'.

What about the priceless fundamental notions of due process and equal protection under the laws?

Democracy rests on the fundamental notion that all citizens have a vote.

The very fundamental notion of the phoneme, for example, has been treated in many different ways.

Russell starts out by defining the "fundamental" notion of a propositional function.

The limit of a sequence is said to be the fundamental notion on which the whole of analysis ultimately rests.

"This was done with the fundamental notion that the capital markets business is important."

Still, to deny the importance of willpower is to attack a fundamental notion about human character.