byteCoderIf you want a primer (in 57 pages) instead of a full book, check out 'Partial Differential Equations
If you want a primer (in 57 pages) instead of a full book, check out 'Partial Differential Equations of Physics' by Robert Geroch (Enrico Fermi institute), publicly available on arXiv 🔗👇 https://t.co/Jr6jTp9UDQ