### Highlighted pages

- Level sets

A introduction to level sets. Illustrates level curves and level surfaces with interactive graphics. - Introduction to the multivariable chain rule

Introduction to the multivariable chain rule. The basic concepts are illustrated through a simple example. - A line or a plane or a point?

Examples showing how the graph of an equation depends on the underlying dimension, becoming a line or a point or a plane. - Spherical coordinates

Illustration of spherical coordinates with interactive graphics. - Parametrized curve and derivative as location and velocity

Description of a parametrization of a curve as the position of a particle and the derivative as the particle's velocity. Illustrated with animated graphics.

### 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

- 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* - The zero vector

The zero vector is the unique vector having zero length. The direction of the zero vector is undefined.*Added March 15, 2014* - The right hand rule for determining orientations in three dimensions
*Added March 15, 2014* - More new items

### Highlighted applets

Using cobwebbing to visualize how a linear approximation to a function captures its behavior around equilibria.

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

### 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.