Equation (13) should be changed into
![](https://static.cambridge.org/binary/version/id/urn:cambridge.org:id:binary:20151128101035694-0819:S0263034612000791_eqnU1.gif?pub-status=live)
That is to say the “n = −∞” should be changed into “n = 1”.
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Published online by Cambridge University Press: 20 November 2012
Equation (13) should be changed into
That is to say the “n = −∞” should be changed into “n = 1”.