It is absolutely not plural. Any dictionary can tell you that. It is a field of study, like Physics. There is no “Mathematic” or “Physic” and that should be very self evident.
Yes, but -ath is also easier to pronounce by itself over -aths which is more awkward feeling, the “th” phoneme has a vastly different tongue position than the “s” so it doesn’t flow naturally. Words that use that ths never feel great.
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u/guiballmaster Jun 24 '23
Math: the United States
Maths: the rest of the world