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Special functions, orthogonal polynomials, harmonic analysis, ordinary differential equations (ODE's), differential relations, calculus of variations, approximations, expansions, asymptotics.

15 votes
Accepted

Steepest descent/gradient descent as dynamical system

This topic has long history. Here are some references: Bloch, Anthony M. "Steepest descent, linear programming and Hamiltonian flows." Contemp. Math. AMS 114 (1990): 77-88. Brockett, Roger W. Dynami …
Piyush Grover's user avatar
1 vote

Measuring how suboptimal control is

Model predictive control (MPC, aka receding horizon control) is one type of sub-optimal control method that is extremely well studied and popular. The "sub-optimality" of this type of control methods …
Piyush Grover's user avatar
2 votes
Accepted

Reference request: Invariant sets of dynamical systems

I am assuming you are interested in multidimensional case $x\in\mathbb R^n$. Let $\Omega$ be the set whose invariance you are interested in estabilishing. There are two types of problems here: A). …
Piyush Grover's user avatar
5 votes
1 answer
366 views

A theory of bifurcation of braids ?

I am trying to study the braids generated by periodic orbits of diffeomorphisms of compact surfaces (for example, a punctured disk). The diffeomorphisms are generated by integrating a two-dimensional …
Piyush Grover's user avatar
0 votes

Link between controllability of ODEs and controllability of transport equations

Here's another references:Elamvazhuthi, Karthik, et al. "Bilinear controllability of a class of advection–diffusion–reaction systems." IEEE Transactions on Automatic Control 64.6 (2018): 2282-2297.
Piyush Grover's user avatar