S1:S2,...,Sm have a SDR VI C{1,2,...,m),Uier SiS1, S2,...,Sm have a SDR ⇥I ￾ {1, 2,...,m}, ￾ ￾ ⇥ i￾I Si ￾ ￾ ￾ |I|. S1, S2,...,Sm have a SDR ⇥I ￾ {1, 2,...,m}, ￾ ￾ ⇥ i￾I Si ￾ ￾ ￾ |I|