In mathematics there are frequently several different ways to solve a problem. The easy one is the right one.
This article is excellent. Clean, concise, well laid out, and " easy" to understand....

Retired. Uber gardener. They gave me a tee shirt at the garden center. Front side; "Resident", "know-it-all" .Back side,"go ahead", "ask me a question"; third line in big red letters,"I DARE YOU".
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