how to prove
$(x^{*}y)^{*}x^{*}y = x^{*}(yx^{*})^{*}y$
I have already checked https://gateoverflow.in/290653/me_test_series?show=290690
It contains extra y.
x*y(yx*)*y
and I am not able to solve this , please help
We already know that $(PQ)^*P=P(QP)^*$
so take RHS $x^* (yx^*)^* y=x^* y(x^* y)^*$
$=(x^*y)^+= LHS$
what is P & Q in this ? Please help
Thank you @Verma Ashish