Resumen de On the operator quadratic equation A + BT +TC + TDT = 0.

Vicente Hernández García , Lucas Antonio Jódar Sánchez

• By means of the application of annihilating entire functions of an operator, the bilateral quadratic equation in operators A + BT +TC + TDT = 0, is changed into an unilateral linear equation, obtaining conditions under which the solutions of such linear equation satisfy the quadratic equation