Mathcore (also known as technical metalcore) is, at its most basic form, a fusion of math rock and metalcore; however, most bands play in a style that can be more closely explained as a polyrhythmic and dissonant form of metalcore, which is recognized for a high level of technical musicianship. Mathcore has its roots in bands like Converge, Botch, and the Dillinger Escape Plan. The term mathcore is suggested by analogy with math rock. Both math rock and mathcore make use of polyrhythms and unusual time signatures. Read more on Last.fm.