## Free textbooks in differential equations

- Ordinary Differential Equations and Dynamical Systems by Gerald Teschl
- Partial Differential Equations by William W. Symes
- Lectures on analytic differential equations by Yulij Ilyashenko and Sergei Yakovenko
- Exterior Differential Systems and Euler-Lagrange Partial Differential Equations by Robert L. Bryant, Phillip A. Griffiths, Daniel A. Grossman
- Numerical Methods for Large Eigenvalue Problems - 2nd Edition by Prof. Yousef Saad.
- Iterative Methods for Sparse Linear Systems by Yousef Saad.
- Theory of Ordinal Differential Equations by Prof. Christopherp. Grant.
- Monograph on quasilinear partial differential equations by Marco Squassina
- Difference Equations to Differential Equations by Dan Sloughter