I’m pretty sure this notation is used (and taught) outside of the US too.

]]>“everyone in the US”, you mean.

]]>This is especially useful when composing functions. A complex function “h” might be the composite of simpler functions “f” and “g”: “h(x) = g(f(x))”. This means that “x” is first given to “f”, which produces an intermediate value, which is then given to “g”. Notice that the flow of data doesn’t match the reading direction. In the alternate proposal, the equation would read “(x)h = ((x)f)g”.

In several branches of mathematics, so called “commutative diagrams” are an important visualization aid. Reversing the traditional notation would help with translating those diagrams to formulas and back.

]]>@Nandini — I recommend you take a look at my earlier post “Are open-access fees disenfranchising?”, which addresses your issue in detail. The summary is this: subscription fees are a more fundamental barrier for indigent researchers, and publication fees need not be a barrier given appropriate waiver policies.

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