[plt-scheme] When does eqv? differ from eq? , from equal?

> Heuristically, I think of eq? as being similar to
> comparing pointers in C and equal? as a test that might involve library call
> that could run in time proportional to the size of the objects (e.g.,
> strcmp).

That's a good way to think about the difference.  Or you can think of
them as object equality versus structural equality.

> What is the intuition behind eqv?

Beats me.  I've never used EQV? in my life.

Shriram