Mathematicians once turned up their noses at imaginary numbers. But complex analysis actually simplifies math and physics.

It's called "i", and it's part of a whole class of numbers called imaginary numbers. MARCUS DU SAUTOY:'Introducing these strange new numbers into mathematics 'required an act of the imagination.

The imaginary number i depicts a number that somehow when ... Euler’s 1740 formula. With decent algebra skills, you can manipulate Euler’s formula to see that most of the standard ...