{ localUrl: '../page/poset_bound_universal_property.html', arbitalUrl: 'https://arbital.com/p/poset_bound_universal_property', rawJsonUrl: '../raw/76k.json', likeableId: '0', likeableType: 'page', myLikeValue: '0', likeCount: '0', dislikeCount: '0', likeScore: '0', individualLikes: [], pageId: 'poset_bound_universal_property', edit: '1', editSummary: '', prevEdit: '0', currentEdit: '1', wasPublished: 'true', type: 'wiki', title: 'Universal property of joins and meets in a poset', clickbait: 'Partially ordered sets are a good setting to illustrate some of the concepts of category theory; joins and meets are instances of category-theoretic ideas.', textLength: '623', alias: 'poset_bound_universal_property', externalUrl: '', sortChildrenBy: 'likes', hasVote: 'false', voteType: '', votesAnonymous: 'false', editCreatorId: 'PatrickStevens', editCreatedAt: '2016-12-31 14:43:34', pageCreatorId: 'PatrickStevens', pageCreatedAt: '2016-12-31 14:43:34', seeDomainId: '0', editDomainId: '163', submitToDomainId: '0', isAutosave: 'false', isSnapshot: 'false', isLiveEdit: 'true', isMinorEdit: 'false', indirectTeacher: 'false', todoCount: '3', isEditorComment: 'false', isApprovedComment: 'false', isResolved: 'false', snapshotText: '', anchorContext: '', anchorText: '', anchorOffset: '0', mergedInto: '', isDeleted: 'false', viewCount: '127', text: '[summary(Technical): In a [-3rb], the [-3rc] are instances of the category-theoretic [4mj product] and coproduct.]\n\n[summary: We can see some of the ideas of [-4c7] by looking at the very simple examples of categories, such as [-3rb]s. In this setting, the [-3rc] turn out to correspond to the [4mj product] and coproduct.]\n\n[todo: state the UP of the product, using the divisibility in $\\mathbb{N}$ example and the example of subsets of $\\{1,2,3,4,5\\}$]\n[todo: state the UP of the coproduct, showing that it's the same as the product in $P^{\\text{op}}$]\n[todo: relate the product and coproduct UPs to the general concepts]', metaText: '', isTextLoaded: 'true', isSubscribedToDiscussion: 'false', isSubscribedToUser: 'false', isSubscribedAsMaintainer: 'false', discussionSubscriberCount: '1', maintainerCount: '1', userSubscriberCount: '0', lastVisit: '', hasDraft: 'false', votes: [], voteSummary: 'null', muVoteSummary: '0', voteScaling: '0', currentUserVote: '-2', voteCount: '0', lockedVoteType: '', maxEditEver: '0', redLinkCount: '0', lockedBy: '', lockedUntil: '', nextPageId: '', prevPageId: '', usedAsMastery: 'false', proposalEditNum: '0', permissions: { edit: { has: 'false', reason: 'You don't have domain permission to edit this page' }, proposeEdit: { has: 'true', reason: '' }, delete: { has: 'false', reason: 'You don't have domain permission to delete this page' }, comment: { has: 'false', reason: 'You can't comment in this domain because you are not a member' }, proposeComment: { has: 'true', reason: '' } }, summaries: {}, creatorIds: [ 'PatrickStevens' ], childIds: [], parentIds: [], commentIds: [], questionIds: [], tagIds: [], relatedIds: [], markIds: [], explanations: [], learnMore: [], requirements: [], subjects: [], lenses: [], lensParentId: '', pathPages: [], learnMoreTaughtMap: {}, learnMoreCoveredMap: {}, learnMoreRequiredMap: {}, editHistory: {}, domainSubmissions: {}, answers: [], answerCount: '0', commentCount: '0', newCommentCount: '0', linkedMarkCount: '0', changeLogs: [ { likeableId: '0', likeableType: 'changeLog', myLikeValue: '0', likeCount: '0', dislikeCount: '0', likeScore: '0', individualLikes: [], id: '21199', pageId: 'poset_bound_universal_property', userId: 'PatrickStevens', edit: '1', type: 'newEdit', createdAt: '2016-12-31 14:43:34', auxPageId: '', oldSettingsValue: '', newSettingsValue: '' } ], feedSubmissions: [], searchStrings: {}, hasChildren: 'false', hasParents: 'false', redAliases: {}, improvementTagIds: [], nonMetaTagIds: [], todos: [], slowDownMap: 'null', speedUpMap: 'null', arcPageIds: 'null', contentRequests: {} }