What we had, in essence, was a model into which we could introduce carefully selected variables.
We introduce Boolean variables x,...,x, where l is the length of the proof.
Even so small an input as a radio signal or the electromagnetic field of a current-carrying wire could introduce literally incalculable variables.
These transformations are guaranteed to only linearly increase the size of the formula, but introduce new variables.
On the other hand, two authors have introduced new variables into Bourdieu's concept of cultural capital.
One may need to introduce auxiliary variables or use a swap construct.
Likely, has to copy the type introducing new variables for the qualification to avoid unwanted captures.
The declarations introduce functions, variables and types.
These symptoms eased when she (as several of the patients have done) reduced her meds - slowly, so as not to introduce new variables.
One of the methods of dealing with non-equilibrium systems is to introduce so-called 'internal variables'.