2
votes
5answers
368 views

How to leave function unevaluated programmatically?

Is it possible to write a function in such manner, that it can be either evaluated or left unevaluated? This is a general question. Sample below is just a sample. No need to find solution for this ...
3
votes
3answers
177 views

How to set a function as a parameter?

In case I want to know whether a given function $f(t)$ have some property, I tried to write something like this: ...