  PIETOOLS 2022 manual is a document that describes all the features of the
MATLAB toolbox for the analysis and control of Partial Integral Equations
(PIEs). The manual is aimed to guide, with examples, the first time users to
three fundamental features of PIETOOLS: converting coupled ODE-PDEs, DDEs,
DDFs, etc., to PIE representation; analysis of stability and input-output
properties of PIEs; design of optimal observers and controllers for PIEs. The
use of PIETOOLS is not limited to the features described above. However, the
manual focuses on these features to provide a holistic understanding of the
workflow of PIETOOLS, which will serve as a foundation to develop more
complicated programs, for example, the design of boundary feedback controllers,
robust observers, robust controllers, etc.
