Wikipedia (from Function Composition):

/g/ ∘ /f/is read as "/g/circle/f/", "/g/round/f/", "/g/about/f/", "/g/composed with/f/", "/g/after/f/", "/g/following/f/", "/g/of/f/", or "/g/on/f/".

I would say 'on', but I don't think that's much better than the others, including 'atop'.  Maybe 'after' would be easiest for newcomers.

Henry Rich


On 5/6/2019 8:38 AM, Brian Schott wrote:
Piet,
I cannot answer your question, but I do not like "atop" either.
To me the rewording would be as follows, though: (your line first, my line
second) notice the missing "of".
'It seems more natural to say (u@v  y)  is  "u of v of y” rather than 'u
atop v of y.”'
'It seems more natural to say (u@v  y)  is  "u of v    y” rather than 'u
atop v of y.”'
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