[see also: although, but, albeit]
The sum in (2), though formally infinite, is therefore actually finite.
For our application though, we need a stronger statement.
Even though we were able to derive a formula for ......, it is not easy to use.
The fact that the number $T(p)$ is uniquely defined, even though $p$ is not, enables us to define the nullity of $A$ as follows.
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