Research index·Book chapterNotesThe MIT Press eBooks·1 Jan 2017DOI10.7551/mitpress/10897.003.0012Book chapterNotesThe MIT Press eBooks · 2017 · SubscriptionDOI10.7551/mitpress/10897.003.0012ReadRead at the publisherSaveCiteAdd to literature reviewPaywalledThe full text is at the publisherOpen it at the publisher to read it.Read at the publisherDiscussionAdd to the discussionTopicsComputer scienceRelated papersMoreDetailsPublished, publisher, languageSuggest a correction or report