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This Mathwright Microworld allows a student to look at systems of linear equations as (1) simultaneous linear equations, (2) vector equations, and (3) matrix equations.

A tribute to one of our authors, who died suddenly and unexpectedly while his second JOMA contribution was in preparation.

This interactive matching game uses Flash to bring to life the standard "reform calculus" problem of matching graphs of function and their (first and second) derivatives.

An article in which the focus-locus, focus-directrix, and cone-slicing descriptions of ellipses are related by way of the space-time geometry of special relativity.
These Javascript enhanced pages provide standard numerical procedures including methods for root-finding, solving linear systems, computing eigenvalues, integration, and data fitting. Each page includes instructions for use and math references.
This server-side application allows the user to enter a list of U.S. cities and gives several standard approximate solutions to the TSP problem for the set using great circle distances for weights.

Parting shots from the outgoing editor.

Announcements of events of interest to Loci readers
A mathlet to construct an antiderivative by accumulating area under the graph of a function.
A Biological ESTEEM module in the BioChemistry Category. This Excel workbook introduces using matrix algebra to balance chemical reactions.