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Old 2022-07-12, 22:55   #4
charybdis's Avatar
Apr 2020

87510 Posts

Originally Posted by wildrabbitt View Post
Perhaps someone recognises it and knows a page online or a book where I could find it?
This (without the easier y=1 case) is a lemma that appears in the proof of Perron's formula. Here is a reference I found.
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