Revision as of 00:55, 10 November 2017 edit 42.109.204.53 (talk) →String projection Tags: Mobile edit Mobile web edit ← Previous edit		Revision as of 00:56, 10 November 2017 edit undo Dark-World25 (talk \| contribs) Extended confirmed users, Rollbackers 4,406 edits m Reverted 1 edit by 42.109.204.53 (talk) to last revision by Eumolpo. (TW) Next edit →
Line 122: \pi_\Sigma(t) & \mbox{if } s=ta \mbox{ and } a \notin \Sigma \\ \pi_\Sigma(t)a & \mbox{if } s=ta \mbox{ and } a \in \Sigma \end{cases}</math>~~kunna~~ Here <math>\varepsilon</math> denotes the [[empty string]]. The projection of a string is essentially the same as a [[projection in relational algebra]].

String operations: Difference between revisions