1
$\begingroup$

Suppose I have $n$ functions namely $f_1,...,f_n$. If I want to sum them then I could use Sigma $\Sigma$, if I want to multiply them, I could use capital Pi $\Pi$. But what if I want to compose all of them? Is there a known notation convention for something like this: $$\circ{}_{i=1}^n f_i$$

$\endgroup$
  • 3
    $\begingroup$ Sincw composition isn't conmutative, I'd just use $f_1\circ \ldots\circ f_n $ to avoid potential confusion. $\endgroup$ – Mark S. May 11 '17 at 10:42
  • 2
    $\begingroup$ I don't think there is an established notation for this. In particular, you'd have to disambiguate whether you mean $f_1\circ \ldots\circ f_n$ or $f_n\circ \ldots\circ f_1$ $\endgroup$ – Hagen von Eitzen May 11 '17 at 10:42

Your Answer

By clicking "Post Your Answer", you acknowledge that you have read our updated terms of service, privacy policy and cookie policy, and that your continued use of the website is subject to these policies.

Browse other questions tagged or ask your own question.