I'm so confused by the typo in the very first word of the very first sentence. It appears they wrote "Qne" instead of "One". Is this some sort of OCR error and the source was scanned in? Or are there keyboard layouts where the Q is near the O?
Ah! I didn't even realize there was a PDF, or that this was an article from Math Horizons. You must be right.
That also explains another thing that confused me: Every time the article mentioned a specific video, it could have easily linked to them, but didn't. The magazine being the source of the article explains that too.
