#### Overview of this book

Mastering SciPy
Credits
www.PacktPub.com
Preface
Free Chapter
Numerical Linear Algebra
Interpolation and Approximation
Differentiation and Integration
Nonlinear Equations and Optimization
Initial Value Problems for Ordinary Differential Equations
Computational Geometry
Descriptive Statistics
Inference and Data Analysis
Mathematical Imaging
Index

## Chapter 5. Initial Value Problems for Ordinary Differential Equations

Initial value problems for ordinary differential equations (or systems) hardly need any motivation. They arise naturally in almost all sciences. In this chapter, we will focus on mastering numerical methods to solve these equations.

Throughout the chapter, we will explore all the techniques implemented in the SciPy stack through three common examples:

• The trivial differential equation of the first order y'(t) = y(t) with the initial condition as y(0) = 1. The actual solution is y(t) = et.

• A more complex differential equation of first order: a Bernoulli equation ty'(t) + 6y(t) = 3ty(t)3/4, with the initial condition y(1) = 1. The actual solution is y(t) = (3t5/2 + 7)4/(10000t6).

• To illustrate the behavior with autonomous systems (where the derivatives do not depend on the time variable), we use a Lotka-Volterra model for one predator and one prey, y0'(t) = y0(t) – 0.1 y0(t) y1(t) and y1'(t) = –1.5 y1(t) + 0.075 y0(t) y1(t...