A mathematical theorem stating that a PERIODIC function f(x) which is reasonably continuous may be expressed as the sum of a series of sine or cosine terms (called the Fourier series), each of which ...

Siva Yellamraju, co-founder and CEO of Fourier, told TechCrunch ... Catalyst and Paramark Ventures leading an $18.5 million Series A round, the company exclusively told TechCrunch.