Recall that
in
0209
Here,
in
0208
Plugging x+2 to x in the formula in 0209 above, we get
on
the left terms
From gamma-shaped multipliers, we can say that
on the right terms
In the same way as above,
in
0209
Plugging x-2 to x in the formula in 0209 at the beginning, we get
on
the left terms
From gamma-shaped multipliers, we can say that
on the right terms
From the formula
in
0208
Adding one on both sides, we get
Since
we can say that
on the left terms
From gamma-shaped multipliers, we can say that
on the right terms