Topics Functions, such as injections, surjections, bijections:

At this time, I only have prepared my paper on surjective or 'onto' functions:

Surjective (onto) Functions.

The Lambert W Function. Some theory and some worked problems.
The Lambert W function is a special function developed by Lambert, Euler,
and other mathematicians over the centuries. Its practical usages go from the quirky to the profound,
especially in physics and chemistry. This article is updated from its original version, containing many
interesting solutions to example problems. To see even more examples, go to my page on math
diversions at Math Diversions and look for those problems marked 'Lambert'.