Want to learn more? Check out my Math 4340 course (Advanced Engineering Mathemaetics), which I've designed to be a natural follow-up to Math 2080.
Links to the individual lectures are listed below. Or, you can view the full YouTube playlist here. To avoid blurriness, these are best viewed by changing the settings to 720p (High Definition) rather than the default of 240p. This can be easily done by clicking the "wheel" on the lower right corner; right next to the "cc" button.