Missing negation.
Merge pull request #606 from kasterma/patch-2

Missing negation.
Fix "Evaluating..." PDF link
Merge pull request #607 from Welliton309/patch-1

Fix "Evaluating..." PDF link
Update Functionals.rmd

Typo
Merge pull request #608 from michaelmikebuckley/patch-1

Update Functionals.rmd
Book now available
Add ids to index