Math Core is a sub-sub-genre to the ever poplular metal and Death Metal.
Math Core is typically defined as Death Metal vocals with Progressive Metal music, utilizing odd meters such as 7/4, and changing keys and tempos constantly.
Named "Math"core because of the complexity of the music, rivaling that of classical composers, not to be confused with neo-classical metal
Math Core typically contains the same make up as a metal band, with 2 guitarists, a bassist, drummer, and singer. but sometimes these come in a power trio, with a guitarist, a Warr guitarist, and drummer.
Protest the Hero, Human Abstract, Behold...the Arctopus are my favorite Math Core bands
Damn I wish I had the Skill to be in a mathcore band