Change of variables from &thgr; to &Dgr;

[Graphics:SoftComptongr18.gif]

[Graphics:SoftComptongr19.gif]

[Graphics:SoftComptongr20.gif]

[Graphics:SoftComptongr21.gif]

[Graphics:SoftComptongr22.gif]

[Graphics:SoftComptongr23.gif]

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