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In production engineering situations where other people need to understand your code using abbreviations are seen as less good. I understand though that the naming should match the math notation. Academic/educational and production code differ. So maybe the argument is moot.
The abbreviations assume a commonly understood context and convention that's consistently applied. It takes a bit longer to get used to but I do think it can be quite effective depending on how it's done. More than one way to achieve the same basic goals (understandability).
and yes, hands down the translations into code do help. Agreed.
