Take the 2-minute tour ×
Mathematics Stack Exchange is a question and answer site for people studying math at any level and professionals in related fields. It's 100% free, no registration required.

If we have a sequence (an ordered list)

$$ S=(s_0,s_1,...,s_n). $$

What is the notation for expressing that $S'$ is a (ordered) subsequence of $S$?

share|improve this question
The indices can be denoted $n_1< n_2<n_3\cdots$; so, $\{ s_{n_i}\}_{i=1}^\infty$. –  David Mitra Dec 14 '11 at 9:22
I'd write $S' \subseteq S$. –  Peteris Dec 14 '11 at 11:31

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Browse other questions tagged or ask your own question.