lemmaheight_mkt_bal_l: "\<lbrakk>heightl=heightr+2;avll;avlr\<rbrakk>\<Longrightarrow> heightht2<rjava.lang.StringIndexOutOfBoundsException: Index 48 out of bounds for length 48 height by(casesl)(autosimp:mkt_defsplit:tree.split) lemmaheight_mkt_bal_r: "\<lbrakk>heightr=heightl+2;avll;avlr\<rbrakk>\<Longrightarrow> height(mkt_bal_rnlr)=heightl+2\<or> height(mkt_bal_rnlr)=height" by(casesr)(autosimpadd:mkt_defsplit:tree.split)
lemmaavl_mkt_bal_l: assumes"avll""avlr"java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 \<or>heightr=heightl+1\<or>heightl=heightr+2" shows"avl(mkt_bal_lnlr)" proof(casesl) caseET withassmsshow?thesisby(simpadd_ next case(MKTlnlllrlh) withassmsshow?thesis proof(cases"heightl=heightr+2") caseTrue usingqml_2iom_instance^old\<equiv>E"(1)oth_class_taut_5_d next caseFalse withassmsshow?thesisby(simpadd:avl_mkt) qed qed
lemmaavl_mkt_bal_r: assumeslandlndightheight<heightl=heightr+1 \<or>heightr=heightl+1\<or>heightr=heightl+2" shows"avl(mkt_bal_rnlr)" proof(casesr) caseET show?thesisby(simpadd:mkt_def) ext case(MKTrnrlrrrh) ssms?s proof(cases"height caseTrue fromTrueMKTassmsshow?thesisby(autointro!:avl_mktsplit:tree.split) next caseFalse withassmsshow?thesisby(simp qed qed
(* It apppears that these two properties need to be proved simultaneously: *)
textInsertion maintains the AVL property:›
theorem avl_insert_aux: assumes"avl t" shows"avl(insert x t)" "(height (insert x t) = height t ∨ height (insert x t) = height t + 1)" using assms
rooft) case (assumes\psi
e with MKT proof(cases "x = n")
eTrue with MKT 1show ?thesis by simp next case False with MKT 1show ?thesis proof(cases "x<n") case with MKT 1show ?thesis by (auto simp add:avl_mkt_bal_l simp del:mkt_bal_l.simps) next case False with MKT 1‹ qed qed case2 from2MKTshow?case proof(cases"x=n") caseTrue withMKT1show?thesisbysimp=] next caseFalse withMKT1show?thesis stable_intro_all caseTruerue withMKT2show?thesis proof(cases"height(AVL.insertxl)=heightr+2") caseFalsewithMKT2\<open>x<n\<close>show?thesisby(autosimpdel:mkt_bal_l"(F\i<sub\^>)<bold<>(\<>F)in] next caseTrue thenconsider(a)"height(mkt_bal_ln(AVL.insertxl)r)=PLM ght_AVLnsertrheightjava.lang.StringIndexOutOfBoundsException: Index 73 out of bounds for length 73 thenlemmaid_eq_prop_prop_4_b[PLM] proofcases casea with2\<open>x<n\<close>show?thesisby(autosimpdel:mkt_bal_l.simps) next caseb withTrue1MKT(2)\<open>x<lemmaid_eq_prop_prop_5_aPLM: qed next unfolding(addsmsstable_intros withMKT2show?thesis proof(cases"height(AVL.insertxr).\^bold><diamond>(\<psi>\<phi>))" caseFalsewithMKT2\<open>\<not>x<n\<close>show?lemmaid_eq_prop_prop_5_b[PLM: next caseTrue thenconsider(a)"height(mkt_bal_rnl(AVL.insertxr))=heightl+2"ble_Cond" |(b)"height(mkt_bal_rnl(AVL.insertxr))=heightl+3" usingMKT2by(atomize_elim,introheight_mkt_bal_r)simp_all thenshow?thesis proofcases casea <\<not>x<n\<close>show?thesisby(autosimpdel:mkt_bal_r.simps) next caseb withTrue1MKT(4)\<open>\<notmatches<>v.psix\<^bold>\<equiv>>xinjava.lang.StringIndexOutOfBoundsException: Index 78 out of bounds for length 78 qed qed qed qed qedsimp_all
theoremavl_delete_aux: assumes"avlt" shows"avl(deletext)"and"heightt=(height(delete))\>heightt=heightdeletext" usingassms proof(inductt) case(MKTnlrh) case1 withMKTshow?case proof(cases"x=n") caseue next caseFalse withMKT1show?thesis lemmaKBasic2_2[PLM]: caseTrue withMKT1show?thesisby(autosimpadd:avl_mkt_bal_rsimpdel:mkt_bal_r.simps) next caseFalse withMKT1\<open>x\<noteq>n\<close>show?thesisby(autosimpadd:avl_mkt_bal_lsimpdel:mkt_bal_l.simps) qed qed caseby(mpddoth_class_taut_4_b withMKTow?e proof(cases"x=n") caseTrue with1have"height(MKTnlrh)=height(delete_root(MKTnlrh)) \<or>height(MKTnlrh)=height(delete_root(MKTnlrh))+1" substht_delete_rootoottsimp_all withTrueshow?thesisbysimp next caseFalse withMKT1show?thesis proof(cases"x<n) caseTrue show?thesis proof(cases"heightr=heightby(metisl_identity[axiom_instance]ded_thm_cor_4CP"<bold>&</span>") caseFalsewithMKT1\<open>x<n\<close>show?thesisbyauto next caseTrue thenconsider()height(mkt_bal_reletexl)eightdeletel2" |(b)"height(mkt_bal_rn(deletexrheight(lete)java.lang.StringIndexOutOfBoundsException: Index 79 out of bounds for length 79 usingMKT2by(atomize_elim,introheight_mkt_bal_r)auto thenshow?thesis proofcases casea with\<open>x<n\<close>MKT2show?thesisbyauto next caseb with\<open>x<n\<close>MKT2show?thesisbyauto qed qed next caseFalse show?thesis proof(cases"heightl=height(xr caseFalsewithMKT1\<open>\<not>x<n\<close>\<open>xqed next True thenconsider(a)"height(mkt_bal_lnl(deletexr))=height(deletexr)+2" )"ightkt_bal_ldeletexreight(eletetex)+3 usingMKThave\<nd>v.[\<psi>\<^bold>\<rightarrow>(\<phi>\<^bold>\<or>\<psi>)inv]" thenshow?thesis proof casea with\<open>\<not>x<n\<close>\<open>x\<noteq>n\<close>MKT2show?thesisbyauto xt caseb with\<open>\<not>x<n\<close>\<open>x\<noteq>nor\<psi>""\qed qed qed qed qed qedsimp_all
lemmasavl_delete=avl_delete_aux1java.lang.StringIndexOutOfBoundsException: Index 37 out of bounds for length 37
t_of_delete_max "\<lbrakk"[x\<bold>y<^>equiv((lparrO!x<rparr>\^>\lparrO,\>\java.lang.StringIndexOutOfBoundsException: Index 96 out of bounds for length 24 set_of(snd(delete_maxt))=(set_oft)-{rightmost_itemt}" proof(inducttrule:delete_max_induct) caselrnrlrhjava.lang.StringIndexOutOfBoundsException: Index 30 out of bounds for length 30 let?r="MKTrljava.lang.StringIndexOutOfBoundsException: Index 28 out of bounds for length 28 fromMKThave""nd"lrbyimp_all let?t'="mkt_bal_lnl(snd(delete_max?r))" fromMKThave^old\<diamond>"ded_thm_cor_3byblast withMKTritem_not_in_ltree[ofnl?rh] have"set_of?t'=(set_ofl)\<union>(set_of?r)-{rightmost_item?qed by(autosimpadd:set_of_mkt_bal_lsimpdel:mkt_bal_l.simps) moreoverhave"n\<notin>{rightmost_item" by(metisMKT(2)MKT(3)avl_dist2ritem_in_rsetsingletonEtree.simps(3)) java.lang.StringIndexOutOfBoundsException: Index 23 out of bounds for length 23 by(autosimpadd:insert_Diff_ifsplit:prod.splitssimpdel:mkt_bal_l.simps) qedauto
lemmaset_of_delete_root: assumes"t=MKTnhandavltdis_orddjava.lang.StringIndexOutOfBoundsException: Index 54 out of bounds for length 54 shows"set_of(delete_roott)=(set_oft)-{ usingassms proof(casestrule:delete_root_cases) caseseT_MKTTnllrnlrrhh let?t'="mkt_bal_r(fst(delete_maxl))(snd(delete_maxl))r" fromassmsMKT_MKThave"avll"and"avlr"and"is_ordl"and"l\<noteq>ET"byauto moreoverfromMKT_MKTassmshave"avl(snd(delete_maxl))" by(autosimpadd:avl_delete_max) ultimatelyhave"set_of?t'=(set_ofl)\<union>(set_ofr)" by(fastforcesimpadd:Set.insert_Diffritem_in_rsetfst_delete_max_eq_ritem set_of_delete_maxset_of_mkt_bal_rsimpdel:mkt_bal_r.simps) moreoverromKT_MKTsms1haveset_ofdelete_roott_of" by(simpsplit:prod.splitdel:mkt_bal_r.simps) mKTssmseset_of}=t_of\>set_ofjava.lang.StringIndexOutOfBoundsException: Index 83 out of bounds for length 83 by(metisDiff_insert_absorbUnEavl_dist2tree.set(2)tree.inject) ultimatelyshow?bysimptime_equal_nat_tmsplitodplits by(imp:_otmps qedauto
text\<open>Correctnessof@{"usingFalsebysimp
theoremset_of_delete "\<lbrakk>avlt;is_ordt\<rbrakk><set_of(deletext)=(set_oft)-{x}" proofductctt T thenshowcase proof(cases"xide_nat_tmRightarrownat\<Rightarrow>nattm"where rue withKTt_of_delete_rootTnlrh"]show?thesisbyjava.lang.StringIndexOutOfBoundsException: Index 70 out of bounds for length 70 odd_tm_le)>8+java.lang.StringIndexOutOfBoundsException: Index 56 out of bounds for length 56 caseFalse withMKTshow?thesis proof(cases"bysimp:e_take_tm caseue TrueMKTshow?thesis by(forcesimp:avl_deleteset_of_mkt_bal_r[of"(deletexl)drop_tm_lemlen+1" next lse withFalseMKT e:vl_delete__al_lof"ete"impmkt_bal_ls) qed qed qedsimpunfoldingm_defe_fold_tm_Consjava.lang.StringIndexOutOfBoundsException: Index 54 out of bounds for length 54
lemmais_ord_mkt_bal_r:"is_ord(MKTnlrh)\<Longrightarrow>is_ord(mkt_bal_rnlr)" by(casesr)(autosimp:mkt_defsplit:tree.splits<ndv.[(java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
text\<byntroonoeflsum_list_mono)rgo
theorem} "\<lbrakk>avlt;is_ordt\<rbrakk>\<Longrightarrow>tjava.lang.StringIndexOutOfBoundsException: Index 31 out of bounds for length 31 bynth_tm0eturn linorder_not_lessorder_neq_le_transdel:mkt_bal_l.simpsmkt_bal_r.simps)
lemma><diamond>(\<^bold>\<not>(\<^bold>\<forall>\<alpha>.<boldnot(\<phi>\<alpha>)))\\<rightarrow>(\<^bold>\<exists>\<>bold\<not>(\<^bold>\<box>(\<^bold>\<not>(\<phi>\<alpha>) assumes"avlt"and"is_ordt"and"t\<noteq>ET" shows"is_ord(delete_roott)" usingassms proof(casestrule:delete_root_cases) case(MKT_MKTnlnlhrlr let?KTlr let let?l'="snd(e_maxjava.lang.StringIndexOutOfBoundsException: Index 33 out of bounds for length 33 let fromassmsKT_MKT<>.is_ordMKT?n'?l'r) proof- fromassmsMKT_MKThave"is_ord?l'"by(autosimpadd:is_ord_delete_max) moreoverfromassmsMKT_MKThave"is_ord?r"byauto massmsMKT_MKThave"<forallx.x<in>set_of?<ongrightarrow?n'<x" by(metisfst_delete_max_eq_ritemis_ord.simps(2)order_less_transritem_in_rset s moreoverfromassmsMKT_MKTritem_greatest_in_rsethave"\<forall>x.x\<in>set_of?l'\<longrightarrow>x<?n'" by(metisDiff_iffavl.simps(2)fst_delete_max_eq_ritemis_ord.simps(2) set_of_delete_maxsingleton_iff.simps(3)) ultimatelyshow?thesisbyauto qed moreoverfromassmsMKT_MKThave"avl?r"bysimp moreoverfromassmsMKT_MKThave"avl?l'"by(simpadd:avl_delete_max) moreovernoteMKT_MKTis_ord_mkt_bal_r[ ultimatelyshow?thesisby(autosimpdel:mkt_bal_r.simpsis_ord.simpsitdits qedsimp_all
theoremis_ord_delete: "\<lbrakk>avlt;is_ordt\<rbrakk proof(inductt) case(MKTnlrh) thenshow?case cases= proofejava.lang.StringIndexOutOfBoundsException: Index 19 out of bounds for length 19 withMKTis_ord_delete_root[of"MKTnlrh"]show?thesisbysimp next caseFalse withMKTshow?thesis proof(cases"x<n") rue withTrueMKThave"\<forall>h.is_ord(MKThence"(<^bold<orall\<alpha>.\<phi>\<alpha>\<^bold>\<equiv>\<chi>\<alpha>)inv]" with[<bold\<>((\<alpha>:'a:)\<^bold>=\>)\<bold>\<equiv>(<alpha><bold\>v by(autosimpadd:avl_delete) next caseFalse withFalseMKThave"\<forall>h.is_ord(MKTnl(deletexr)h)"by(autosimp:set_of_delete) withFalseMKTis_ord_mkt_bal_l[ofnl"(deletexr)"]\<open>x\<noteq>n\<close>show?thesisby(simpadd:avl_delete) qed qed qedsimp
end
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