### Highlighted pages

- 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. - Forming planes

A description of ways to specify a plane. Interactive graphics illustrate the concepts. - Parametrization of a line

Introduction to how one can parametrize a line. Interactive graphics illustrate basic concepts. - Spherical coordinates

Illustration of spherical coordinates with interactive graphics. - Subtleties about divergence

Counterexamples illustrating how the divergence of a vector field may differ from the intuitive appearance of the expansion of a vector field.

### 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

- Visualizing the solution to a two-dimensional system of linear ordinary differential equations

An interactive plot of the the solution trajectory of a 2D linear ODE, where one can explore the behavior of the solution in the phase plane and versus time.*Added Sept. 20, 2016* - The determinant of a matrix

The calculation of the determinant of a matrix, a single number that gives useful information about the matrix.*Added Jan. 14, 2016* - Applications of integration
*Added Oct. 27, 2015* - More new items

### Highlighted applets

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

The level curves of an elliptic paraboloid are shown as the intersection of a horizontal plane with the graph.

### 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.