{ localUrl: '../page/category_of_finite_sets.html', arbitalUrl: 'https://arbital.com/p/category_of_finite_sets', rawJsonUrl: '../raw/614.json', likeableId: '0', likeableType: 'page', myLikeValue: '0', likeCount: '0', dislikeCount: '0', likeScore: '0', individualLikes: [], pageId: 'category_of_finite_sets', edit: '1', editSummary: '', prevEdit: '0', currentEdit: '1', wasPublished: 'true', type: 'wiki', title: 'Category of finite sets', clickbait: 'The category of finite sets is exactly what it claims to be. It's a useful training ground for some of the ideas of category theory.', textLength: '905', alias: 'category_of_finite_sets', externalUrl: '', sortChildrenBy: 'likes', hasVote: 'false', voteType: '', votesAnonymous: 'false', editCreatorId: 'PatrickStevens', editCreatedAt: '2016-08-29 09:16:48', pageCreatorId: 'PatrickStevens', pageCreatedAt: '2016-08-29 09:16:48', seeDomainId: '0', editDomainId: 'AlexeiAndreev', submitToDomainId: '0', isAutosave: 'false', isSnapshot: 'false', isLiveEdit: 'true', isMinorEdit: 'false', indirectTeacher: 'false', todoCount: '3', isEditorComment: 'false', isApprovedComment: 'true', isResolved: 'false', snapshotText: '', anchorContext: '', anchorText: '', anchorOffset: '0', mergedInto: '', isDeleted: 'false', viewCount: '1549', text: '[summary: The category of finite sets is a nice easy [4c7 category] to work in. Its objects are the finite sets, and its arrows are the [3jy functions] between the [5zy finite sets].This makes it a very concrete and understandable category to present some of the basic ideas of category theory.]\n\n[comment: This page is more of a definition page; it's not really intended to explain anything, because all the necessary explanations should already have been done in finite_set.]\n\nThe category of finite sets is a nice easy [4c7 category] to work in. Its objects are the finite sets, and its arrows are the [3jy functions] between the [5zy finite sets].This makes it a very concrete and understandable category to present some of the basic ideas of category theory.\n\n[todo: give example objects and arrows]\n\n[todo: it has all finite limits and colimits]\n\n[todo: mention that it is a full subcategory of Set]', 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: [ 'category_theory', 'finite_set' ], commentIds: [], questionIds: [], tagIds: [ 'stub_meta_tag' ], 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: '19382', pageId: 'category_of_finite_sets', userId: 'PatrickStevens', edit: '0', type: 'newTag', createdAt: '2016-08-29 09:16:50', auxPageId: 'stub_meta_tag', oldSettingsValue: '', newSettingsValue: '' }, { likeableId: '0', likeableType: 'changeLog', myLikeValue: '0', likeCount: '0', dislikeCount: '0', likeScore: '0', individualLikes: [], id: '19379', pageId: 'category_of_finite_sets', userId: 'PatrickStevens', edit: '0', type: 'newParent', createdAt: '2016-08-29 09:16:49', auxPageId: 'finite_set', oldSettingsValue: '', newSettingsValue: '' }, { likeableId: '0', likeableType: 'changeLog', myLikeValue: '0', likeCount: '0', dislikeCount: '0', likeScore: '0', individualLikes: [], id: '19381', pageId: 'category_of_finite_sets', userId: 'PatrickStevens', edit: '0', type: 'newParent', createdAt: '2016-08-29 09:16:49', auxPageId: 'category_theory', oldSettingsValue: '', newSettingsValue: '' }, { likeableId: '0', likeableType: 'changeLog', myLikeValue: '0', likeCount: '0', dislikeCount: '0', likeScore: '0', individualLikes: [], id: '19377', pageId: 'category_of_finite_sets', userId: 'PatrickStevens', edit: '1', type: 'newEdit', createdAt: '2016-08-29 09:16:48', auxPageId: '', oldSettingsValue: '', newSettingsValue: '' } ], feedSubmissions: [], searchStrings: {}, hasChildren: 'false', hasParents: 'true', redAliases: {}, improvementTagIds: [], nonMetaTagIds: [], todos: [], slowDownMap: 'null', speedUpMap: 'null', arcPageIds: 'null', contentRequests: {} }