I asked a question about ua(x) just now.

Then I realized I have no idea how to read aloud the symbol.

Usually I read aloud X1 as "X one". Should I read aloud ua(x) as "u a of x"?


I would pronounce this:


as f of x.

And I would pronounce this:


as u sub a.

Therefore, I would pronounce your expression as: u sub a of x.

Note: This assumes that ua is a function. If ua was a variable and not a function, then I suppose this could be a multiplication expression instead. In that case, I would say: u sub a times x

  • Following the link, we find that in the intended context u_a is indeed a function. – Anton Sherwood Sep 20 '19 at 19:41
  • @AntonS - True, but for the sake of completeness, I figured it would be better to leave an answer for the general case. – J.R. Sep 20 '19 at 19:43
  • 1
    If only it were easy to upload an audio file...because a non-native pronunciation of "a" and "u" could be very different from the one native speakers understand. – Mari-Lou A Sep 22 '19 at 11:44


Here u refers to an object with a dependance to another object a.

When a is an integer, we commonly say that u is a sequence.

More generally, if a is a complex number, we can say that u is a function of a (just like in the idea that u is function of a, I.E. it depends on a ).

So simply, just as you read "f(x)", f of x, i'd say "ua(x)" u of a, because you could also write

ua(x) = u(a)(x)

  • Do you mean "dependence on" instead of "dependance to"? – Jasper Sep 27 '19 at 21:29

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.