An algebraic equation of the fourth degree

The ATLAS Forward Proton Project is a project at the ATLAS experiment at the Large Hadron Collider to detect protons in its forward area.

Quartic or biquadratic reciprocity is a collection of theorems in elementary and algebraic number theory that state conditions under which the congruence x4 ≡ p is solvable; the word "reciprocity" comes from the form of some of these theorems, in that they relate the solvability of the congruence x4 ≡ p to that of x4 ≡ q.

Of or relating to the fourth degree.