Controlling Numerical Evaluation
|NHoldAll||prevent any arguments of a function from being affected by N|
|NHoldFirst||prevent the first argument from being affected|
|NHoldRest||prevent all but the first argument from being affected|
Attributes for controlling numerical evaluation.
goes inside functions and gets applied to each of their arguments.
This tells Mathematica
not to apply N
to the first argument of f
Now the first argument of f
is left in its exact form.