You’ve probably heard of Newton’s Method from your calculus course. It can be used to locate zeros of real-valued functions. But did...

Continue reading...# matrix

## Really Complex Matrices

If you know how to multiply 2×2 matrices, and know about complex numbers, then you’ll enjoy this connection. Any complex number...

Continue reading...## Products of Sums of Two Squares

Here’s a nice theorem due to Fibonacci, in 1202. Theorem. If integers N and M can each be written as the...

Continue reading...## Making Magic Squares

A magic square is an NxN matrix in which every row, column, and diagonal add up to the same number....

Continue reading...## Magic Squares, indeed!

Perhaps you’ve seen the magic square 8 1 6 3 5 7 4 9 2 which has the property that all rows,...

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