Books by Christopher Heil

Wish Rings is about a boy named Majunior who learns of his great powers. His powers are brought on by the death of his parents. After Majunior masters his great powers of fire, he stops all sorts of evil that tries to take over earth. Then he uses the great powers of the Mighty Barbarian, which lives within mystical rings, known as the Wish Rings, to undo the damage done to earth by evil. All through Majunior's journey to save earth, he meets new and more powerful people who share their knowledge with him.

This textbook is a self-contained introduction to the abstract theory of bases and redundant frame expansions and their use in both applied and classical harmonic analysis. The four parts of the text take the reader from classical functional analysis and basis theory to modern time-frequency and wavelet theory.