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Doing it with generating functions is essentially the same as what is done in the post under a different name.
by ajkjk 2y ago
Doing it with generating functions is essentially the same as what is done in the post under a different name.
- shiandow 2y agoTrue, but the generating functions make it easier to prove that this works, rather than relying on the properties of a particular function (properties that you can most easily prove by reverting to the generating functions).