Now, on to the subject of complex numbers. We have stayed away from this subject until now simply because we did not want to confuse things. Initially, it is easy to think of signals as “real valued.” ...

To a nonmathematician, having the letter “i” represent a number that does not quite exist and is “imaginary” can be hard to wrap your head around. If you open your mind to this way of thinking, ...

Imagine winding the hour hand of a clock back from 3 o’clock to noon. Mathematicians have long known how to describe this rotation as a simple multiplication: A number representing the initial ...

Physicists have built a real-number version of quantum mechanics that makes all the same predictions as the standard theory, ...

Imagine winding the hour hand of a clock back from 3 o’clock to noon. Mathematicians have long known how to describe this rotation as a simple multiplication: A number representing the initial ...

A mathematics professor says Yu Jianchun, a 33-year-old package delivery man who has never taken advanced math classes, has ‘an instinct and an extreme sensitivity to numbers’ You can save this ...

A Chinese migrant worker with no college degree has found a solution to a complex math problem – in what appears to be a real life version of the Oscar-winning movie “Good Will Hunting.” Yu Jianchun, ...