what does the asterisk denote here ; why do we let this ? any explanation
4 months, 1 week ago
@Calvin Lin any answer would be appreciable
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It is just a change of variables. Sometimes people use \( a_1 \), sometimes people use \( a' \), sometimes people use \( a^* \).
We keep the \(a\) to denote that it is relevant to the original variable \(a\).