I am perplexed by the negativity. This has nothing to do with mathematics, it's about notational conventions. Only knowing about one of them does not make you b

I am perplexed by the negativity. This has nothing to do with mathematics, it's about notational conventions. Only knowing about one of them does not make you better at taking limits. If the objection is about context dependence, why is nobody going "Would you mind elaborating on the O(10) and what you mean by that? O(10) is the orthogonal group in ten dimensions".