Das and Genton modeled the nonstationary period and amplitude by defining them as functions that vary over time.

American Journal of Mathematics, Vol. 101, No. 4 (Aug., 1979), pp. 743-759 (17 pages) The elementary functions of a complex variable z are those functions built up from the rational functions of z by ...

Cryptographic hash functions are mathematical functions that are often used with cryptocurrency. Find out in this guide how they work and what their role is.

Many mathematicians over the years have explained why the theorem works using algebra and geometry. In contrast ... is that a lot of people thought it was impossible,” he said. “Trigonometric ...