“…An intensive study of composition operators is made over the past several decades. To worth mention, few of them are Ridge [10], Singh [11,12],Singh and Komal [13], Singh and Kumar [14], Singh and Manhas [15]. Setpanov [16,17], Whitley [18] established the Lyubic's conjecture and generalized it to Volterra composition operators on L p [0,1].…”