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Collective notation for variables a,b
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Sorry, exceedingly stupid question but googles not helping.
I read in a book (theoretical minimum: classical mechanics) that for a function of variables x,y,z the collective notation for x,y,z is x(i) (that i is a subscript) so for a function of a,b would the notation for a,b collectively be a(i) or still x(i)
Side note: maths needs more letters
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