Here $c$ denotes a constant which can vary from line to line.
Fix $n$ and let $c$ vary.
A natural question to ask is how the quantities $A(S,T)$ and $B(S,T)$ vary as $S$ and $T$ change.
As we let $t$ vary, $f(t)$ describes a curve in $M$.
Within $I$, the function $f$ varies $\langle$oscillates$\rangle$ by less than 1.
The idea is that $C$ is fixed, but $X$ and $Y$ vary according to circumstances.
Then $F$ varies smoothly in $t$.
The samples vary in length.
Note that $m$ is permitted to vary with the number of inputs.
A number of authors have considered, in varying degrees of generality, the problem of determining ......
a slowly varying function
Computer evidence suggests the dynamics of these maps is rich and varied.