### Highlighted pages

- The idea of the divergence of a vector field

Intuitive introduction to the divergence of a vector field. Interactive graphics illustrate basic concepts. - Spherical coordinates

Illustration of spherical coordinates with interactive graphics. - Introduction to the multivariable chain rule

Introduction to the multivariable chain rule. The basic concepts are illustrated through a simple example. - The cross product

Introduction to the cross product with a focus on its basic properties. Includes an interactive graphic to illustrate these properties of the cross product. - Developing an initial model to describe bacteria growth

By analyzing some data and hypothesizing rules for cell division, we develop a discrete dynamical system for the growth of a population of bacteria.

### Recent news

Redesigned for small screens

by Duane Q. Nykamp on May 31, 2012Interactive Gallery of Quadric Surfaces

by Duane Q. Nykamp on March 14, 2012- More recent news

### Recent pages

- Solving pure-time differential equations with the Forward-Euler algorithm
*Added May 18, 2015* - Graphical solution of pure-time differential equations
*Added April 21, 2015* - The standard unit vectors

The standard unit vectors are the vectors of length one that point along the positive coordinates axes.*Added March 15, 2014* - More new items

### Highlighted applets

Animation of the mapping of rectangle by a nonlinear change of variables.

A bacteria population that doubles every time step illustrates a discrete dynamical system.

### Welcome to Math Insight

The Math Insight web site is a collection of pages and applets designed to shed light on concepts underlying a few topics in mathematics. The focus is on qualitative description rather than getting all technical details precise. Many of the pages were designed to be read even before students attend lecture on the topic, so they are intended to be somewhat readable introductions to the basic ideas.

You can browse the pages organized into threads, which are sequences through a subset of pages organized by particular topics. An index can help you find pages discussing a particular term. You can also search through the pages, applets, and image captions. A few pages allow you to change the notation system used to render the mathematics.

We hope Math Insight can help you understand key mathematical concepts. We welcome comments on how we can improve it.