| author | huffman | 
| Wed, 12 Oct 2005 03:01:09 +0200 | |
| changeset 17838 | 3032e90c4975 | 
| parent 16747 | 934b6b36d794 | 
| child 18080 | c1a7490ee3ff | 
| permissions | -rw-r--r-- | 
| 2640 | 1  | 
(* Title: HOLCF/One.thy  | 
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ID: $Id$  | 
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Author: Oscar Slotosch  | 
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removed LICENCE note -- everything is subject to Isabelle licence as
 
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The unit domain.  | 
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Franz Regensburger's Higher-Order Logic of Computable Functions embedding LCF
 
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*)  | 
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Franz Regensburger's Higher-Order Logic of Computable Functions embedding LCF
 
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parents:  
diff
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header {* The unit domain *}
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theory One  | 
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imports Lift  | 
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begin  | 
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14981 
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types one = "unit lift"  | 
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parents:  
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constdefs  | 
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ONE :: "one"  | 
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"ONE \<equiv> Def ()"  | 
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translations  | 
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"one" <= (type) "unit lift"  | 
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text {* Exhaustion and Elimination for type @{typ one} *}
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lemma Exh_one: "t = \<bottom> \<or> t = ONE"  | 
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apply (unfold ONE_def)  | 
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huffman 
parents: 
14981 
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apply (induct t)  | 
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efb95d0d01f7
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huffman 
parents: 
14981 
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apply simp  | 
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efb95d0d01f7
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huffman 
parents: 
14981 
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apply simp  | 
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efb95d0d01f7
converted to new-style theories, and combined numbered files
 
huffman 
parents: 
14981 
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changeset
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done  | 
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efb95d0d01f7
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huffman 
parents: 
14981 
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lemma oneE: "\<lbrakk>p = \<bottom> \<Longrightarrow> Q; p = ONE \<Longrightarrow> Q\<rbrakk> \<Longrightarrow> Q"  | 
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15576
 
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apply (rule Exh_one [THEN disjE])  | 
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huffman 
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apply fast  | 
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huffman 
parents: 
14981 
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apply fast  | 
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efb95d0d01f7
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huffman 
parents: 
14981 
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changeset
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done  | 
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parents: 
14981 
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lemma dist_less_one [simp]: "\<not> ONE \<sqsubseteq> \<bottom>"  | 
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15576
 
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huffman 
parents: 
14981 
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39  | 
apply (unfold ONE_def)  | 
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apply simp  | 
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15576
 
efb95d0d01f7
converted to new-style theories, and combined numbered files
 
huffman 
parents: 
14981 
diff
changeset
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done  | 
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efb95d0d01f7
converted to new-style theories, and combined numbered files
 
huffman 
parents: 
14981 
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changeset
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lemma dist_eq_one [simp]: "ONE \<noteq> \<bottom>" "\<bottom> \<noteq> ONE"  | 
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15576
 
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converted to new-style theories, and combined numbered files
 
huffman 
parents: 
14981 
diff
changeset
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44  | 
apply (unfold ONE_def)  | 
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apply simp_all  | 
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15576
 
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converted to new-style theories, and combined numbered files
 
huffman 
parents: 
14981 
diff
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done  | 
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huffman 
parents: 
14981 
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lemma compact_ONE [simp]: "compact ONE"  | 
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by (rule compact_chfin)  | 
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243
 
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Franz Regensburger's Higher-Order Logic of Computable Functions embedding LCF
 
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parents:  
diff
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end  |