# DDE-BIFTOOL state-dependent delays sd-demo

This demo is an illustrative example, showing how to perform bifurcation analysis for a system with state-dependent delays.

The demo shows

- which functions the user has to provide and how to put them into the structure
`funcs`(sd_demo_funcs.html) - continuation of equilibria and their linear stability sd_demo_stst.html,
- detection and continuation of Hopf bifurcations sd_demo_hopf.html,
- branching off from Hopf bifurcation and continuation of periodic orbits sd_demo_psol.html

% (c) DDE-BIFTOOL v. 3.1.1(20), 11/04/2014

## Contents

## Differential equations

The differential equations for this example are

where and are constant delays and

This system has five components , six delays and eleven parameters , where and .

clear; % clear variables close all; % close figures addpath('../../ddebiftool/'); % add ddebiftool folder to path %#ok<*ASGLU,*NOPTS,*NASGU>