What is "polynices"

In Greek mythology, Polynices, sometimes spelled Polyneices, ( Greek: Πολυνείκης, transl. Polyneíkes, "manifold strife") was the son of Oedipus and Jocasta. His wife was Argea. His father, Oedipus, was discovered to have killed his father and married his mother, and was expelled from Thebes, leaving his sons Eteocles and Polynices to rule. Because of a curse put on them by their father Oedipus, the sons Polynices and Eteocles did not share the rule peacefully and died as a result by killing each other in a battle for the control of Thebes.