This factor is cleverly chosen to
make … means we assume that .
Page 27. To get
(2.10), recall that . Hence
Page 28. Let's see how exactly
We can now subtract the second
equation from the first.
Page 28. We add a tiny but significant detail to the expansion of the summation
factor. It starts with substitution of and into
Page 29. Substituting the summation factor into
(2.10), for ,
, , we derive that
Page 29. We finalize this journey through gotchas with a lucky number
we're looking into deriving the formula
(2.14), which is even luckier.
And we're done here 🎉 🥳 !