author | paulson |
Wed, 16 Jan 2002 17:53:22 +0100 | |
changeset 12777 | 70b2651af635 |
parent 12338 | de0f4a63baa5 |
child 14981 | e73f8140af78 |
permissions | -rw-r--r-- |
2841
c2508f4ab739
Added "discrete" CPOs and modified IMP to use those rather than "lift"
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1 |
(* Title: HOLCF/Discrete1.ML |
c2508f4ab739
Added "discrete" CPOs and modified IMP to use those rather than "lift"
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2 |
ID: $Id$ |
c2508f4ab739
Added "discrete" CPOs and modified IMP to use those rather than "lift"
nipkow
parents:
diff
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3 |
Author: Tobias Nipkow |
12030 | 4 |
License: GPL (GNU GENERAL PUBLIC LICENSE) |
2841
c2508f4ab739
Added "discrete" CPOs and modified IMP to use those rather than "lift"
nipkow
parents:
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5 |
|
c2508f4ab739
Added "discrete" CPOs and modified IMP to use those rather than "lift"
nipkow
parents:
diff
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6 |
Proves that 'a discr is a cpo |
c2508f4ab739
Added "discrete" CPOs and modified IMP to use those rather than "lift"
nipkow
parents:
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7 |
*) |
c2508f4ab739
Added "discrete" CPOs and modified IMP to use those rather than "lift"
nipkow
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diff
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8 |
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12338
de0f4a63baa5
renamed class "term" to "type" (actually "HOL.type");
wenzelm
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Goalw [less_discr_def] "((x::('a::type)discr) << y) = (x=y)"; |
3018 | 10 |
by (rtac refl 1); |
2841
c2508f4ab739
Added "discrete" CPOs and modified IMP to use those rather than "lift"
nipkow
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11 |
qed "discr_less_eq"; |
c2508f4ab739
Added "discrete" CPOs and modified IMP to use those rather than "lift"
nipkow
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12 |
AddIffs [discr_less_eq]; |
c2508f4ab739
Added "discrete" CPOs and modified IMP to use those rather than "lift"
nipkow
parents:
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13 |
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11346 | 14 |
Goalw [chain_def] |
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renamed class "term" to "type" (actually "HOL.type");
wenzelm
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"!!S::nat=>('a::type)discr. chain S ==> S i = S 0"; |
5192 | 16 |
by (induct_tac "i" 1); |
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eliminated the constant less by the introduction of the axclass sq_ord
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by (rtac refl 1); |
3018 | 18 |
by (etac subst 1); |
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by (rtac sym 1); |
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by (Fast_tac 1); |
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2841
c2508f4ab739
Added "discrete" CPOs and modified IMP to use those rather than "lift"
nipkow
parents:
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21 |
qed "discr_chain0"; |
c2508f4ab739
Added "discrete" CPOs and modified IMP to use those rather than "lift"
nipkow
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22 |
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5068 | 23 |
Goal |
12338
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renamed class "term" to "type" (actually "HOL.type");
wenzelm
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"!!S::nat=>('a::type)discr. chain(S) ==> range(S) = {S 0}"; |
4098 | 25 |
by (fast_tac (claset() addEs [discr_chain0]) 1); |
2841
c2508f4ab739
Added "discrete" CPOs and modified IMP to use those rather than "lift"
nipkow
parents:
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26 |
qed "discr_chain_range0"; |
c2508f4ab739
Added "discrete" CPOs and modified IMP to use those rather than "lift"
nipkow
parents:
diff
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27 |
Addsimps [discr_chain_range0]; |
c2508f4ab739
Added "discrete" CPOs and modified IMP to use those rather than "lift"
nipkow
parents:
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28 |
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11346 | 29 |
Goalw [is_lub_def,is_ub_def] |
12338
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renamed class "term" to "type" (actually "HOL.type");
wenzelm
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"!!S. chain S ==> ? x::('a::type)discr. range(S) <<| x"; |
3018 | 31 |
by (Asm_simp_tac 1); |
2841
c2508f4ab739
Added "discrete" CPOs and modified IMP to use those rather than "lift"
nipkow
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32 |
qed "discr_cpo"; |