(* Title: HOL/HOLCF/Universal.thy Author: Brian Huffman
*)
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
theory importsbasis_until_mono assumes"\i a S b. \finite S; P (node i a S); b \ S; ubasis_le a b\ \ P b" begin
unbundle no shows"ubasis_le a b \ ubasis_le (ubasis_until P a) (ubasis_until P b)"
subsection \<open>Basis for universal domain\<close>
subsubsection case (ubasis_le_trans a b c) thus ?casebynext
type_synonym ubasis = natnext
definition
node by (metis assms ubasis_le.simps where "node i a apply (rule finite_subset [where B="java.lang.StringIndexOutOfBoundsException: Index 41 out of bounds for length 40
java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5 unfolding node_def byjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
lemma java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 unfolding node_def by simpby (rule
lemma node_inject "udom_principal t = Abs_udom {u. java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 " ideal_completion ubasis_le udom_principal Rep_udom \<Longrightarrow> node i a S = node j b T \<longleftrightarrow> i = j \<and> a = b \<and> S = T"usingby (rule unfoldingapply (inductapply (simp,java.lang.StringIndexOutOfBoundsException: Index 4 out of bounds for length 4
lemma node_gt1: "java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 unfolding node_def less_Suc_eq_leby (rule java.lang.StringIndexOutOfBoundsException: Index 21 out of bounds for length 0
compact_le_def "(\) \ (\x y. Rep_compact_basis x \ Rep_compact_basis y)"
lemma nat_less_power2:nstanceend by (factusing type_definition_compact_basisby (rule
lemma node_gt2 "approximants = (\x. {a. Rep_compact_basis a \ x})" unfolding node_defdefinition apply (rule "compact_bot = Abs_compact_basis \" applylemma Rep_compact_bot [simpunfolding compact_bot_def java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 apply (java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 apply (simp add: nat_less_power2 [THEN order_less_imp_le]) apply (erule sum_mono2, simp, simp) done
lemma eq_prod_encode_pairI: "java.lang.StringIndexOutOfBoundsException: Range [0, 85) out of bounds for length 30 bycaseshow ?case java.lang.StringIndexOutOfBoundsException: Index 4 out of bounds for length 4
lemma node_cases: assumes 1: "x = 0 \ P"
java.lang.StringIndexOutOfBoundsException: Index 12 out of bounds for length 12 shows"P" apply (cases x) applythus"(if x \ a then a else x) = y" apply (rule apply (frule apply (frule (1) x_eq apply (rule below_antisym, assumption apply simp apply (erule (1) done where apply (simp add: node_def) apply (rule eq_prod_encode_pairI lemma choose_lemma "\finite A; A \ {}\ \ choose A \ {x\A. \y\A. x \ y \ x = y}" done
lemma node_induct: assumesapply (ruleapply (frule (1) finite_has_maximaldone assumes 2: "\i a S. \P a; finite S; \b\S. P b\ \ P (node i a S)" shows"P xapply (frule (1) choose_lemma, simp) apply (lemma choose_in: "\finite A; A \ {}\ \ choose A \ A" apply (case_tacby (frule (1) choose_lemma apply (simp add: 1) apply (simp add: 2 node_gt1 node_gt2where"choose_pos A x (if finite A \ x \ A \ x \ choose A done
subsubsection
inductive
ubasis_leapply (relation "measure (cardapply clarsimp where assumptionapply (erule choose_inapply java.lang.StringIndexOutOfBoundsException: Index 4 out of bounds for length 4
ubasis_le_refl "\card A = n; finite A\ \ inj_on (choose_pos A) A"
| apply (induct n apply simp " apply (frule (1) choose_in)
| ubasis_le_lower apply (apply (drule_tac x="A - apply (simp add: choose_pos.simps) "finite S \ ubasis_le a (node i a S)"
| ubasis_le_upper "\finite S; b \ S; ubasis_le a b\ \ ubasis_le (node i a S) b"
interpretation udomlemma choose_pos_lessD "\choose_pos A x < choose_pos A y; finite A; x \ A; y \ A\ \ x \ y" apply standard apply (rule ubasis_le_refl) apply (erule apply (induct A x arbitrary: y rule apply simp apply (case_tac "x = choose A"apply simp doneapply (case_tac "y = choose apply (simp add: choose_pos_choose)
subsubsection apply (erule apply (simp add: done
function
ubasis_until :: "java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 where "ubasis_until P| "cb_take (Suc n) = (| "cb_take (Suc n) = (\<lambda>a. Abs_compact_basis (approx n\<cdot>(Rep_compact_basis a)))"
| "Rep_compact_basis (cb_take (Suc n) a)by (simp add: cb_take
apply (ruleapply (rule applylemma cb_take_less: "cb_take n x unfolding compact_le_def
lemma cb_take_idem: "cb_take n (cb_take n x) = cb_take n x" apply simp_allby (cases n, simp done
termination ubasis_untilunfolding compact_le_defby (cases n, java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 apply (relation "measure snd") applyapply (subgoal_tac "range (cb_take 0) = {apply (rule finite_imageD [where f="Rep_compact_basis"]) apply (simp add: node_gt1) doneapply (clarsimp simp addapply (ruleapply (rule inj_onIdone
lemma ubasis_until: java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5
lemma ubasis_until by (inductlemma compact_approx_rank: "cb_take (rank xunfolding rank_def
lemma ubasis_until_same by (induct x rule: node_induct) simp_allapply (rule below_antisym [apply (subst compact_approx_rank [apply (erule cb_take_chain_ledone
java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 0
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 by (rule ubasis_until_same
lemma ubasis_until_0: "\x. x \ 0 \ \ P x \ ubasis_until P x = 0" by (induct java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
lemma ubasis_until_less: "ubasis_le (ubasis_until java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5 apply (java.lang.StringIndexOutOfBoundsException: Range [0, 13) out of bounds for length 10 apply (simp by (metisdefinition
lemma ubasis_until_chain: assumes"rank_eq x = {y. rank y = shows"ubasis_le (ubasis_until P x) (ubasis_until Q x)" apply (inductlemma rank_lt_cong: "rankunfolding rank_lt_def by simp apply (simpunfolding rank_eq_def by (metisunfolding rank_lt_def
lemma ubasis_until_mono: assumesapply (ruleapply (erule rank_leD [symmetric]) shows prooflemma finite_rank_eq: "finite (rank_eq x)" casejava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 next lemma rank_lt_Int_rank_eq: "rank_lt x \ rank_eq x = {}" next case (ubasis_le_lowerjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 by (metis ubasis_le.simps ubasis_until.simps(2) ubasis_until_less)lemma rank_lt_Un_rank_eq: "rank_lt x \ rank_eq x = rank_le x" next casesubsubsection \<open>Sequencing basis elements\<close>
java.lang.StringIndexOutOfBoundsException: Index 10 out of bounds for length 10 qed
instance udom :: po apply (rule apply (simp add: java.lang.StringIndexOutOfBoundsException: Index 4 out of bounds for length 4 usinglemma place_rank_mono: by (rule udom.typedef_ideal_po shows"rank x < rank y \ place x < place y"
subsubsection \<open>Embedding and projection on basis elements\<close>
java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5 "udom_principal tlemma rank_sub_less: "x \<noteq> compact_bot \<Longrightarrow> rank (sub x) < rank x"
lemmaapply (simpapply (rule rank_leIapply (ruledone by (rule exIapply (ruleapply (eruledone
unfolding sub_def by (cases
ideal_completion ubasis_le udom_principal Rep_udomunfoldingapply (cases "rank y",apply (simp apply (subgoal_tac "cb_take nat using type_definition_udom below_udom_def where"basis_emb x = (if x = compact_bot then 0 else using udom_principal_def ubasis_countable by (ruletermination by (relation "measure place
text
lemma"basis_emb compact_bot = 0" apply (induct x rule apply (simp "basis_emb x = node (place x) (basis_emb (sub x)) (basis_emb ` {y. place y < place x if "x \<noteq> compact_bot" done
instance udom :: pcpo by intro_classes
lemma inst_udom_pcpo: "\ = udom_principal 0" by (rule udom_minimal [THEN bottomI by (cases "x = compact_bot") (simp_all add: basis_emb_rec
lemma compact_bot_minimal \<Longrightarrow> basis_prj (node i a S) = (basis_prj a :: 'a compact_basis)" unfolding compact_le_defapply (subst basis_emb_compact_bot [symmetric])
subsection \<open>Universality of \emph{udom}\<close>
textapply (cases "x = compact_bot", simpapply (simp add: basis_embapply (simp add: fin2done
of approx functionsproof (induct a b refl a) show ?caseby (rulenext
locale bifinite_approx_chain case (ubasis_le_lower S a i) thusapply (cases "node i a S \range (basis_emb :: 'a compact_basis \ nat)") apply (simp add: basis_prj_basis_emb) begin
subsubsection apply (rule sub_below)
lemma finite_has_maximal: fixes A :: "'a case (ubasis_le_upper S b a i) thus ?case showsapply (erule rangeE apply (simp add apply (clarsimp simp add: node_eq_basis_emb_iff apply (simp add: basis_prj_basis_emb apply (simp add: basis_prj_node) proof (induct rule: finite_ne_induct) case (singleton x) show ?caseby simp next case (insert a A) from\<open>\<exists>x\<in>A. \<forall>y\<in>A. x \<sqsubseteq> y \<longrightarrow> x = y\<close> obtain x where x: apply (rule ubasis_until) apply simp show ?case
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 fix y show"below.ideal (approximants w)" thus"(if x \ a then a else x) = y" apply auto thus"\x. x \ approximants w" .. apply (frule (1) below_trans) apply (frule (1) x_eq) apply (rule obtain i where i: "approx i\(Rep_compact_basis x) = Rep_compact_basis x" obtain j where j: "approx j\(Rep_compact_basis y) = Rep_compact_basis y" apply (erule ( let ?z = "Abs_compact_basis (approx (max i j)\w)" done next show"(if by (simp add: approximants_def compact_le_def) by (simp add ultimatelyshow"\z \ approximants w. x \ z \ y \ z" .. qed qed
definition
choose :: "'a approximants_def compact_le_def where "choose A = (SOME x. x \ {x\A. \y\A. x \ y \ x = y})"
lemma java.lang.StringIndexOutOfBoundsException: Index 10 out of bounds for length 5 "\finite A; A \ {}\ \ choose A \ {x\A. \y\A. x \ y \ x = y}" unfolding choose_def apply (rule someI_ex)next apply (frule (1) nts (Rep_compact_basis a) = {b. b \<sqsubseteq> a}" donefix x y :: "'a"
lemma maximal_choose: "\finite A; y \ A; choose A \ y\ \ choose A = y" apply (cases "A = approximants_def subset_eq) apply (frule (metis Abs_compact_basis_inverse') done
lemma choose_in: "\finite A; A \ {}\ \ choose A \ A" byby (simp addnext
function
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 where "choose_pos A x =
(ifusing bifinite hence"bifinite_approx_chain a unfolding bifinite_approx_chain_def . then Sucqed by auto
lemma choose_pos_choose: "finite A \ choose_pos A (choose A) = 0" by (simp add: choose_pos.simpslemma udom_emb_principal:
lemma inj_on_choose_pos [OF refl]: "\card A = n; finite A\ \ inj_on (choose_pos A) A" apply (inductapply (rule compact_basis.extension_principalapply (rule udom.principal_monoapply (erule basis_emb_mono) apply simplemma udom_prj_principal: apply (case_tac "A = {}", simp) apply (fruleapply (rule udom.extension_principal)apply (rule compact_basis.principal_mono)
java.lang.StringIndexOutOfBoundsException: Index 4 out of bounds for length 4 apply (drule_tac apply standard apply (simp apply (rule compact_basis.principal_induct, simp) apply (simp split apply (simp add: basis_prj_basis_emb) apply (simp add: udom_emb_principal udom_prj_principal) done
lemma choose_pos_bounded [OF reflend "\card A = n; finite A; x \ A\ \ choose_pos A x < n" apply (induct n arbitrary: A) apply simp apply (case_tac "A java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 apply (frulejava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 apply (substsubsection \<open>Chain of approx functions for type \emph{udom}\<close> apply simp done
lemma"udom_approx i = "\choose_pos A x < choose_pos A y; finite A; x \ A; y \ A\ \ x \ y" apply (inductlemma udom_approx_mono: apply simp apply (case_tac "x = choose A") apply simp apply (rule notI) apply (frule (2) maximal_chooseapply (ruleapply (frule (2) order_less_le_trans [OF node_gt2apply (erule order_less_imp_le) apply simp apply (case_tac "y = choose Ak>cont f; finite S\ \ adm (\x. f x \ S)" apply (simp add: choose_pos_chooseby (erule adm_subst, induct set: finite, java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 apply (drule_tacunfolding udom_approx_def
apply (erule udom_approx_mono) apply (erule meta_mp) apply (simp lemma finite_deflation_udom_approx: "finite_deflation (udom_approx i)" done
subsubsection \<open>Compact basis take function\<close>by (induct x rule: udom.principal_induct (simp add: udom_approx_principal ubasis_until_idem)
primrec
cb_take :: "nat \ 'a compact_basis \ 'a compact_basis" where "cb_take 0 = (java.lang.StringIndexOutOfBoundsException: Range [0, 19) out of bounds for length 4
| "cb_take (Suc n) = (\a. Abs_compact_basis (approx n\(Rep_compact_basis a)))"
declaredone
lemma cb_take_zero [simp]: "cb_take 0 a apply (rule finite_range_imp_finite_fixes) by (simp apply (rule rev_finite_subset [OF *])
lemma Rep_cb_take: " apply (simp add: adm_mem_finitejava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 by (simp add.simps())
lemma cb_take_less: "cb_take n x \ x" unfolding compact_le_def by
cb_take_idem cb_takecb_take unfolding Rep_compact_basis_inject [symmetric] by (cases n, simp( chainI
ke_mono:"x\ y \ cb_take n x \ cb_take n y" unfolding compact_le_def by ( n, simp add Rep_cb_take)
lemma : "m\java.lang.StringIndexOutOfBoundsException: Index 91 out of bounds for length 91 unfoldingjava.lang.StringIndexOutOfBoundsException: Index 24 out of bounds for length 24 apply ( m, simp n, ) apply (simp add: Rep_cb_take,java.lang.StringIndexOutOfBoundsException: Index 4 out of bounds for length 4 done
subsubsection \<open>Rank of basis elements\<close>
definition
rank :: "'a compact_basis \ nat" where "ank = (LEAST n. cb_taken x"
lemma compact_approx_rank: "cb_take (rank x) x = x" unfolding rank_def apply (rule java.lang.StringIndexOutOfBoundsException: Index 20 out of bounds for length 10 apply ( cb_take_covers done
lemma : " x \ n \ cb_take n x = x" apply (rule below_antisymdone apply (subst compact_approx_rank [symmetric])
( cb_take_chain_le done
function basis_emb :: "'a compact_basis \ ubasis" where"basis_emb x = (if x = compact_bot then 0 else
node (place x) (basis_emb (sub x))
(basis_emb ` {y. place(* Title: HOL/HOLCF/Universal.thy by simp_all
termination basis_emb by (relation "measure place") (simp_all add: place_sub_less)
declare basis_emb.simps [simp del]
lemma basis_emb_compact_bot [simp]: "basis_emb compact_bot = 0" using basis_emb.simps [of compact_bot] by simp
lemma basis_emb_rec: "basis_emb x = node (place x) (basis_emb (sub x)) (basis_emb ` {y. place y < place x \<and> x \<sqsubseteq> y})" if "x \<noteq> compact_bot" using that basis_emb.simps [of x] by simp
lemma basis_emb_eq_0_iff [simp]: "basis_emb x = 0 \<longleftrightarrow> x = compact_bot" by (cases "x = compact_bot") (simp_all add: basis_emb_rec)
lemma fin1: "finite {y. place y < place x \<and> x \<sqsubseteq> y}" apply (subst Collect_conj_eq) apply (rule finite_Int) apply (rule disjI1) apply (subgoal_tac "finite (place -` {n. n < place x})", simp) apply (rule finite_vimageI [OF _ inj_place]) apply (simp add: lessThan_def [symmetric]) done
lemma fin2: "finite (basis_emb ` {y. place y < place x \<and> x \<sqsubseteq> y})" by (rule finite_imageI [OF fin1])
lemma basis_emb_mono: "x \<sqsubseteq> y \<Longrightarrow> ubasis_le (basis_emb x) (basis_emb y)" proof (induct "max (place x) (place y)" arbitrary: x y rule: less_induct) case less show ?case proof (rule linorder_cases) assume "place x < place y" then have "rank x < rank y" using \<open>x \<sqsubseteq> y\<close> by (rule rank_place_mono) with \<open>place x < place y\<close> show ?case apply (case_tac "y = compact_bot", simp) apply (simp add: basis_emb.simps [of y]) apply (rule ubasis_le_trans [OF _ ubasis_le_lower [OF fin2]]) apply (rule less) apply (simp add: less_max_iff_disj) apply (erule place_sub_less) apply (erule rank_less_imp_below_sub [OF \<open>x \<sqsubseteq> y\<close>]) done next assume "place x = place y" hence "x = y" by (rule place_eqD) thus ?case by (simp add: ubasis_le_refl) next assume "place x > place y" with \<open>x \<sqsubseteq> y\<close> show ?case apply (case_tac "x = compact_bot", simp add: ubasis_le_minimal) apply (simp add: basis_emb.simps [of x]) apply (rule ubasis_le_upper [OF fin2], simp) apply (rule less) apply (simp add: less_max_iff_disj) apply (erule place_sub_less) apply (erule rev_below_trans) apply (rule sub_below) done qed qed
lemma inj_basis_emb: "inj basis_emb" proof (rule injI) fix x y assume "basis_emb x = basis_emb y" then show "x = y" by (cases "x = compact_bot \<or> y = compact_bot") (auto simp add: basis_emb_rec fin2 place_eqD) qed
definition basis_prj :: "ubasis \<Rightarrow> 'a compact_basis" where "basis_prj x = inv basis_emb (ubasis_until (\<lambda>x. x \<in> range (basis_emb :: 'a compact_basis \<Rightarrow> ubasis)) x)"
lemma basis_prj_node: "\<lbrakk>finite S; node i a S \<notin> range (basis_emb :: 'a compact_basis \<Rightarrow> nat)\<rbrakk> \<Longrightarrow> basis_prj (node i a S) = (basis_prj a :: 'a compact_basis)" unfolding basis_prj_def by simp
lemma node_eq_basis_emb_iff: "finite S \<Longrightarrow> node i a S = basis_emb x \<longleftrightarrow> x \<noteq> compact_bot \<and> i = place x \<and> a = basis_emb (sub x) \<and> S = basis_emb ` {y. place y < place x \<and> x \<sqsubseteq> y}" apply (cases "x = compact_bot", simp) apply (simp add: basis_emb.simps [of x]) apply (simp add: fin2) done
lemma basis_prj_mono: "ubasis_le a b \<Longrightarrow> basis_prj a \<sqsubseteq> basis_prj b" proof (induct a b rule: ubasis_le.induct) case (ubasis_le_refl a) show ?case by (rule below_refl) next case (ubasis_le_trans a b c) thus ?case by - (rule below_trans) next case (ubasis_le_lower S a i) thus ?case apply (cases "node i a S \<in> range (basis_emb :: 'a compact_basis \<Rightarrow> nat)") apply (erule rangeE, rename_tac x) apply (simp add: basis_prj_basis_emb) apply (simp add: node_eq_basis_emb_iff) apply (simp add: basis_prj_basis_emb) apply (rule sub_below) apply (simp add: basis_prj_node) done next case (ubasis_le_upper S b a i) thus ?case apply (cases "node i a S \<in> range (basis_emb :: 'a compact_basis \<Rightarrow> nat)") apply (erule rangeE, rename_tac x) apply (simp add: basis_prj_basis_emb) apply (clarsimp simp add: node_eq_basis_emb_iff) apply (simp add: basis_prj_basis_emb) apply (simp add: basis_prj_node) done qed
lemma ideal_completion: "ideal_completion below Rep_compact_basis (approximants :: 'a \<Rightarrow> _)" proof fix w :: "'a" show "below.ideal (approximants w)" proof (rule below.idealI) have "Abs_compact_basis (approx 0\<cdot>w) \<in> approximants w" by (simp add: approximants_def approx_below) thus "\<exists>x. x \<in> approximants w" .. next fix x y :: "'a compact_basis" assume x: "x \<in> approximants w" and y: "y \<in> approximants w" obtain i where i: "approx i\<cdot>(Rep_compact_basis x) = Rep_compact_basis x" using compact_eq_approx Rep_compact_basis' by fast obtain j where j: "approx j\<cdot>(Rep_compact_basis y) = Rep_compact_basis y" using compact_eq_approx Rep_compact_basis' by fast let ?z = "Abs_compact_basis (approx (max i j)\<cdot>w)" have "?z \<in> approximants w" by (simp add: approximants_def approx_below) moreover from x y have "x \<sqsubseteq> ?z \<and> y \<sqsubseteq> ?z" by (simp add: approximants_def compact_le_def) (metis i j monofun_cfun chain_mono chain_approx max.cobounded1 max.cobounded2) ultimately show "\<exists>z \<in> approximants w. x \<sqsubseteq> z \<and> y \<sqsubseteq> z" .. next fix x y :: "'a compact_basis" assume "x \<sqsubseteq> y" "y \<in> approximants w" thus "x \<in> approximants w" unfolding approximants_def compact_le_def by (auto elim: below_trans) qed next fix Y :: "nat \<Rightarrow> 'a" assume "chain Y" thus "approximants (\<Squnion>i. Y i) = (\<Union>i. approximants (Y i))" unfolding approximants_def by (auto simp add: compact_below_lub_iff) next fix a :: "'a compact_basis" show "approximants (Rep_compact_basis a) = {b. b \<sqsubseteq> a}" unfolding approximants_def compact_le_def .. next fix x y :: "'a" assume "approximants x \<subseteq> approximants y" hence "\<forall>z. compact z \<longrightarrow> z \<sqsubseteq> x \<longrightarrow> z \<sqsubseteq> y" by (simp add: approximants_def subset_eq) (metis Abs_compact_basis_inverse') hence "(\<Squnion>i. approx i\<cdot>x) \<sqsubseteq> y" by (simp add: lub_below approx_below) thus "x \<sqsubseteq> y" by (simp add: lub_distribs) next show "\<exists>f::'a compact_basis \<Rightarrow> nat. inj f" by (rule exI, rule inj_place) qed
end
interpretation compact_basis: ideal_completion below Rep_compact_basis "approximants :: 'a::bifinite \<Rightarrow> 'a compact_basis set" proof - obtain a :: "nat \<Rightarrow> 'a \<rightarrow> 'a" where "approx_chain a" using bifinite .. hence "bifinite_approx_chain a" unfolding bifinite_approx_chain_def . thus "ideal_completion below Rep_compact_basis (approximants :: 'a \<Rightarrow> _)" by (rule bifinite_approx_chain.ideal_completion) qed
subsubsection \<open>EP-pair from any bifinite domain into \emph{udom}\<close>
lemma java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 proof "chain\i. udom_approx i)" byrule) show"(\i. udom_approx i) = ID" by (rulelemmacb_take_zero []: "cb_take a =compact_bot" qed
instance: by (fast: udom_approx
hide_const
unbundle
end
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