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Suppose a DMC has the property that for some input assignment P(x)＞0，x∈A={0，1，…，k-1}，the variance of I(x；y)=0．Prove that the input assignment achieves channel capacity．
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We are pleased to inform you that the L/C No．101lA issued by the Bank of China under our S/C No．88008 has just been received．However, on examining the clauses contained in the L/C, we regretfully find that certain points are not in conformity with (do not conform to)the terms stipulated in the contract．The discrepancies are listed as follows:
1．Commission is 5% , not 6%;
2．Shipment will be made during June/July, instead of "on or before July";
3．Goods should be insured for 110% of the invoice value, not 150%;
4．"From China to Copenhagen port" should read" from Copenhagen to China";
5．The bill of lading should be marked "Freight Prepaid" instead of "Freight Collected";
We suppose(assume) that the above mistakes are clerical and hope you will amend the L/C accordingly．On receipt of your amendment to the L/C , we will arrange for the shipment without delay(immediately).
Your prompt attention to the above will be appreciated.
Yours faithfully,
