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A quartic is an algebraic equation or function of the fourth degree.
Quartic means that the "dominant" term is proportional to n^4
A quartic.
Luca Pacioli (1445-1515) discussed quartic equations, but did not have a general solution. Lodovico Ferrari (1522-1565) devised a solution.
Leonarda Burke has written:
'On a case of the triangles in-and-circumscribed to a rational quartic curve with a line of symmetry' -- subject(s): Quartic Curves, Triangle