Leonardo de Moura
dce86b3a84
feat(library/init/logic): add 'eq.drec' (in standard Lean) with a signature very similar to eq.rec in the HoTT library
2015-06-03 17:29:26 -07:00
Leonardo de Moura
70d0dea02d
feat(library/init/logic): add more congruence theorems
...
Remark: the simplifier should be able to select the "right" one.
2015-06-02 14:06:15 -07:00
Leonardo de Moura
2f9005827c
feat(library/init/logic): 'if-then-else' and 'dependent-if-then-else' congruence theorems
...
We will use these theorems to test the new simplifier.
2015-06-02 13:27:50 -07:00
Leonardo de Moura
00232e70d6
feat(hott,library): auxiliary theorems for simplifier
2015-05-27 16:35:56 -07:00
Leonardo de Moura
6db08c5519
test(library): test new tactics in the standard library
2015-05-25 16:48:33 -07:00
Jeremy Avigad
8bebd104ff
refactor(library/*): remove 'Module:' lines
2015-05-23 20:52:23 +10:00
Leonardo de Moura
379af8a04e
feat(library): avoid 'definition' hack for theorems
2015-05-09 12:15:30 -07:00
Leonardo de Moura
8086ad7461
feat(library/init): define quot.hrec_on and quot.hrec_on₂ based on heterogeneous equality
...
They are easier to use than the version with nested eq.rec's
2015-05-09 09:49:41 -07:00
Leonardo de Moura
4f0f739ea6
feat(library): remove occurrences of 'opaque' keyword
2015-05-08 16:40:03 -07:00
Leonardo de Moura
aff9257c72
feat(frontends/lean): allow → to be used in calc proofs
...
see issue #586
2015-05-07 12:28:47 -07:00
Leonardo de Moura
cd17618f4a
refactor(library): replace 'calc_trans', 'calc_symm', 'calc_refl' and 'calc_subst' commands with attributes '[symm]', '[refl]', '[trans]' and '[subst]'
...
These attributes are used by the calc command.
They will also be used by tactics such as 'reflexivity', 'symmetry' and
'transitivity'.
See issue #500
2015-05-02 15:15:35 -07:00
Leonardo de Moura
458d13025f
refactor(library,hott): define 'congr' in the initialization files
2015-05-02 11:29:31 -07:00
Leonardo de Moura
072bf0b3b4
refactor(library): make sure "choose" compute inside the kernel
2015-04-25 23:10:48 -07:00
Leonardo de Moura
bf8a7eb9b4
fix(library/scoped_ext): bug in local metadata in sections
...
The problem is described in issue #554
2015-04-21 18:56:28 -07:00
Leonardo de Moura
1d87016f03
refactor(library): move some theorems to init
2015-04-07 07:46:11 -07:00
Leonardo de Moura
4ec0e1b07c
feat(frontends/lean): improve calc mode
...
Now, it automatically supports transitivity of the form
(R a b) -> (b = c) -> R a c
(a = b) -> (R b c) -> R a c
closes #507
2015-04-04 08:58:35 -07:00
Leonardo de Moura
44ba0e10c0
feat(library/init/logic): add rewrite rules for decidable
2015-04-02 23:31:40 -07:00
Leonardo de Moura
ce5e83eb3e
refactor(library/init): move subsingleton to init folder
2015-04-01 11:57:29 -07:00
Leonardo de Moura
ec1a60b02c
feat(library/init/logic): add helper function for proving decidable equality
2015-03-30 02:14:26 -07:00
Jeremy Avigad
e019ab5500
fix(library/init/logic.lean): rename inhabited_imp_nonempty
2015-03-25 18:29:06 -07:00
Leonardo de Moura
9c0375b6e2
feat(library/init/logic): add transitivity theorems for = + <->
2015-03-01 10:09:46 -08:00
Leonardo de Moura
68110faa4d
feat(frontends/lean/inductive_cmd): allow '|' in inductive datatype declarations
2015-02-25 17:00:10 -08:00
Jeremy Avigad
e513b0ead4
refactor(library,hott): rename theorems for decidable and inhabited
...
The convention is this: we use e.g. nat.is_inhabited and nat.has_decidable_eq
for these two purposes only, to avoid clashing with "inhabited" and "decidable_eq"
in a namespace. Otherwise, we use "decidable_foo" and "inhabited_foo".
2015-02-25 14:05:07 -08:00
Leonardo de Moura
3ede8e9150
refactor(library): use [] binder annotation when declaring instances
2015-02-24 16:12:39 -08:00
Leonardo de Moura
1cd44e894b
feat(library/tactic/class_instance_synth): conservative class-instance resolution: expand only definitions marked as reducible
...
closes #442
2015-02-24 16:12:35 -08:00
Leonardo de Moura
a35cce38b3
feat(frontends/lean): new semantics for "protected" declarations
...
closes #426
2015-02-11 14:09:25 -08:00
Leonardo de Moura
4e49e73585
refactor(library/init/logic): add inhabited related functions, rename inhabited.default to default
2015-01-07 18:45:58 -08:00
Jeremy Avigad
50f03c5a09
refactor(library/data/nat/order): make nat order an instance of linear_ordered_semigroup, rename various theorems
2015-01-07 18:18:28 -08:00
Leonardo de Moura
d8f3bcec67
feat(library/init/logic): add 'arbitrary'
...
It is identical to default, but it is opaque.
That is, when we use 'arbitrary A', we cannot rely on the particular
value selected.
2015-01-05 13:27:09 -08:00
Leonardo de Moura
4781fc8365
fix(library/init/logic): eq.symm should not use eq.subst
...
Reason: eq.symm is used by definitional package, and eq.subst is opaque.
Thus, computation will get stuck if it depends on eq.subst.
2015-01-02 22:20:08 -08:00
Leonardo de Moura
9eea32b076
refactor(library/init/datatypes): change implicit arguments of sum.inl and sum.inr
2014-12-19 18:07:13 -08:00
Leonardo de Moura
abe129aa4f
refactor(library): rename theorems "iff.flip_sign -> not_iff_not_of_iff" and "decidable_iff_equiv -> decidable_of_decidable_of_iff"
2014-12-15 19:17:51 -08:00
Leonardo de Moura
5cf8064269
refactor(library): rename exists_elim and exists_intro to exists.elim
...
and exists.intro
2014-12-15 19:07:38 -08:00
Leonardo de Moura
6e84696960
fix(library/init/logic): expose inhabited basic instances
2014-12-13 14:26:44 -08:00
Jeremy Avigad
6f775be1b6
feat(library/algebra/ordered_ring): start on ordered_ring, and minor changes elsewhere
2014-12-13 11:35:35 -08:00
Leonardo de Moura
477d79ae47
refactor(library/init): move more theorems to logic
2014-12-12 13:50:53 -08:00
Leonardo de Moura
d6c8e23b03
refactor(library/init/logic): move theorems to library/logic
2014-12-12 13:24:17 -08:00
Leonardo de Moura
d50b7a8ba1
refactor(library/init/logic): move theorems to logic/cast
2014-12-12 12:39:16 -08:00
Leonardo de Moura
b01cf73a91
feat(library/init/logic): add is_true and is_false
2014-12-11 18:14:03 -08:00
Leonardo de Moura
e72c4977f0
feat(frontends/lean): nicer notation for dependent if-then-else
2014-12-04 11:13:09 -08:00
Leonardo de Moura
fca97d5bb2
feat(library/definitional): add brec_on construction, closes #272
2014-12-03 10:39:32 -08:00
Leonardo de Moura
e6672b958f
fix(library/tactic/inversion_tactic): add missing case
2014-12-01 19:11:44 -08:00
Leonardo de Moura
697d4359e3
refactor(library): add 'init' folder
2014-11-30 20:34:12 -08:00
