This is a collection of notes on partial differential equations. What standard engineering mathematics texts tell you about these equations is largely useless. You learn how to solve specific simple problems using methods like separation of variables and Laplace transforms. After you have spend a lot of time on that, you still know absolutely nothing about partial differential equations. This book covers the missing parts.
Sections marked with ``[NC]'' in their title are not part of the material covered in ``Analysis in Mechanical Engineering II.'' Read them if you are interested.
The usual “Why this book?” blah-blah will eventually be found in a note at the back of this book, {N.1} A version history is in note {N.2}.
This is a living document. At this stage it is a rough initial concept. That is reflected in the version number. Maybe at some later time it becomes something useful for a general audience to read.