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... xpected.
The candidate that Old Su proposed....
Is it really him?
Han Gonglian.
This is a mathematician from the Northern Song Dynasty, with very little information left behind about him, and later generations don't even know his courtesy name.
It's only in his birthplace's "Guping County Anecdotes" that there's some brief mention of him calling himself Mr. Yang Huai.
After all, nicknames in those days were like Bilibili usernames in later times, a ...
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