log

age author description
Thu, 22 Sep 2011 11:09:10 -0400 Adam Chlipala LogicProg exercise on group theory
Tue, 20 Sep 2011 14:07:21 -0400 Adam Chlipala New LogicProg chapter
Tue, 20 Sep 2011 11:08:05 -0400 Adam Chlipala thide parsing-motivating definitions at start of Predicates
Mon, 19 Sep 2011 14:04:09 -0400 Adam Chlipala Pass through Chapter 4
Wed, 14 Sep 2011 14:04:08 -0400 Adam Chlipala Publish this repo publicly
Mon, 12 Sep 2011 18:57:05 -0400 Adam Chlipala Fix 'make clean'
Mon, 12 Sep 2011 16:47:43 -0400 Adam Chlipala New release
Mon, 12 Sep 2011 16:42:51 -0400 Adam Chlipala New InductiveTypes exercises and difficulty markings
Mon, 12 Sep 2011 11:21:27 -0400 Adam Chlipala Finished pass over InductiveTypes
Sun, 11 Sep 2011 17:22:36 -0400 Adam Chlipala Pass through InductiveTypes, through end of reflexive types
Sun, 11 Sep 2011 16:26:48 -0400 Adam Chlipala Pass through InductiveTypes, through end of recursive types
Wed, 07 Sep 2011 13:47:24 -0400 Adam Chlipala Rename Tactics; change 'principal typing' to 'principal types'
Thu, 01 Sep 2011 11:33:55 -0400 Adam Chlipala New release
Thu, 01 Sep 2011 11:32:15 -0400 Adam Chlipala Pass through second half of StackMachine
Mon, 29 Aug 2011 15:31:06 -0400 Adam Chlipala Pass through first half of StackMachine, along with some reorganization of the build process
Mon, 29 Aug 2011 09:47:39 -0400 Adam Chlipala Fix .hgignore and check in .bib
Thu, 25 Aug 2011 15:22:20 -0400 Adam Chlipala Front page tweaks
Thu, 25 Aug 2011 14:55:38 -0400 Adam Chlipala New release
Thu, 25 Aug 2011 14:41:49 -0400 Adam Chlipala Finished 2011 pass through Intro
Thu, 25 Aug 2011 11:46:56 -0400 Adam Chlipala Started revising Intro
Wed, 03 Aug 2011 10:34:53 -0400 Adam Chlipala Further emphasize necessity and purpose of Set Implicit Arguments; tweak Makefile to support parallel builds
Tue, 28 Jun 2011 08:38:08 -0400 Adam Chlipala Clarify need to insert hidden commands
Tue, 18 Jan 2011 08:16:19 -0500 Adam Chlipala New release
Mon, 17 Jan 2011 15:12:30 -0500 Adam Chlipala Tweak mark-up to support coqdoc 8.3
Mon, 17 Jan 2011 11:42:09 -0500 Adam Chlipala Typo fix
Fri, 14 Jan 2011 15:43:32 -0500 Adam Chlipala Forgot to increment two timestamps
Fri, 14 Jan 2011 15:40:06 -0500 Adam Chlipala New release
Fri, 14 Jan 2011 14:55:32 -0500 Adam Chlipala Small tweak to keep things working in 8.2
Fri, 14 Jan 2011 14:39:12 -0500 Adam Chlipala Everything compiles in Coq 8.3pl1
Thu, 09 Dec 2010 14:39:49 -0500 Adam Chlipala Spelling errors found preparing JFR paper
Thu, 09 Dec 2010 14:30:24 -0500 Adam Chlipala First cut at spellcheck filter
Thu, 09 Dec 2010 13:44:57 -0500 Adam Chlipala Fixes added while proofreading JFR camera-ready
Wed, 10 Nov 2010 16:34:46 -0500 Adam Chlipala New release
Wed, 10 Nov 2010 16:31:04 -0500 Adam Chlipala A pass of double-quotes and LaTeX operator beautification
Wed, 10 Nov 2010 15:42:05 -0500 Adam Chlipala PC comments for DeBruijn
Wed, 10 Nov 2010 15:37:01 -0500 Adam Chlipala PC comments for FirstOrder
Wed, 10 Nov 2010 15:00:37 -0500 Adam Chlipala PC comments on Reflection and Large
Wed, 10 Nov 2010 14:46:27 -0500 Adam Chlipala PC comments for Match
Wed, 10 Nov 2010 14:05:00 -0500 Adam Chlipala PC-inspired Universes tweaks
Wed, 10 Nov 2010 13:16:12 -0500 Adam Chlipala PC changes to Equality and Generic
Wed, 10 Nov 2010 07:56:30 -0500 Adam Chlipala Typo fix
Fri, 05 Nov 2010 13:48:39 -0400 Adam Chlipala PC comments for DataStruct
Fri, 05 Nov 2010 11:36:36 -0400 Adam Chlipala PC comments for MoreDep
Fri, 05 Nov 2010 10:35:56 -0400 Adam Chlipala Subset suggestions from PC; improvements to build process for coqdoc fontification
Fri, 15 Oct 2010 09:50:34 -0400 Adam Chlipala PC's Chapter 5 comments
Tue, 12 Oct 2010 09:30:17 -0400 Adam Chlipala PC's Chapter 4 comments
Fri, 01 Oct 2010 14:19:20 -0400 Adam Chlipala Incorporate PC's comments on InductiveTypes
Fri, 01 Oct 2010 13:39:05 -0400 Adam Chlipala Some improvements to installation instructions, based on Mitch Wand's feedback
Tue, 21 Sep 2010 09:50:33 -0400 Adam Chlipala PC comments for Chapter 2
Mon, 28 Jun 2010 08:02:09 -0400 Adam Chlipala Announce last change in RSS
Mon, 28 Jun 2010 07:59:01 -0400 Adam Chlipala A suggestion from sbriais: mention that Coq >=8.2 allows omitted match cases
Sat, 15 May 2010 06:44:41 -0400 Adam Chlipala Update RSS feed
Sat, 15 May 2010 06:42:05 -0400 Adam Chlipala Typo pointed out by Ben Moseley
Wed, 28 Apr 2010 11:40:03 -0400 Adam Chlipala Typo fix in Equality, found proof-reading tutorial
Mon, 19 Apr 2010 16:49:26 -0400 Adam Chlipala Some bug fixes while working on JFR version
Wed, 03 Feb 2010 08:17:02 -0500 Adam Chlipala Bug fixes
Wed, 03 Feb 2010 08:14:39 -0500 Adam Chlipala Fix PDF ToC generation; mention Set Implicit Arguments in StackMachine
Wed, 27 Jan 2010 07:40:03 -0500 Adam Chlipala Add RSS feed
Wed, 06 Jan 2010 10:25:31 -0500 Adam Chlipala Mailing list announcement text expansion
Wed, 30 Dec 2009 13:47:59 -0500 Adam Chlipala First beta release
Wed, 30 Dec 2009 13:38:13 -0500 Adam Chlipala Import DeBruijn
Mon, 28 Dec 2009 14:33:39 -0500 Adam Chlipala New release
Mon, 28 Dec 2009 14:31:40 -0500 Adam Chlipala Prose for OpSem
Mon, 28 Dec 2009 12:35:44 -0500 Adam Chlipala OpSem code
Wed, 16 Dec 2009 17:31:57 -0500 Adam Chlipala New release
Wed, 16 Dec 2009 17:24:58 -0500 Adam Chlipala Prosified Intensional
Wed, 16 Dec 2009 16:45:50 -0500 Adam Chlipala Dbify_sound
Wed, 16 Dec 2009 16:21:29 -0500 Adam Chlipala Wf_wf
Wed, 16 Dec 2009 15:54:50 -0500 Adam Chlipala Easy direction of Intensional
Wed, 16 Dec 2009 15:31:54 -0500 Adam Chlipala Prosified Extensional
Wed, 16 Dec 2009 13:50:24 -0500 Adam Chlipala Prosified Interps
Wed, 16 Dec 2009 13:16:44 -0500 Adam Chlipala Done prosifying Hoas
Wed, 16 Dec 2009 11:33:53 -0500 Adam Chlipala PHOAS intro section
Wed, 16 Dec 2009 10:39:22 -0500 Adam Chlipala Hoas intro
Fri, 11 Dec 2009 16:19:39 -0500 Adam Chlipala New release
Fri, 11 Dec 2009 16:18:29 -0500 Adam Chlipala Proofreading pass over Firstorder
Fri, 11 Dec 2009 16:07:27 -0500 Adam Chlipala Prose for LocallyNameless
Fri, 11 Dec 2009 15:00:42 -0500 Adam Chlipala Automated LocallyNameless
Fri, 11 Dec 2009 14:05:56 -0500 Adam Chlipala Proved preservation for LocallyNameless
Fri, 11 Dec 2009 10:18:45 -0500 Adam Chlipala Proved progress for LocallyNameless
Wed, 09 Dec 2009 15:26:22 -0500 Adam Chlipala Prose for old part of Firstorder
Wed, 09 Dec 2009 14:12:33 -0500 Adam Chlipala New release
Wed, 09 Dec 2009 13:59:01 -0500 Adam Chlipala Build Processes
Wed, 09 Dec 2009 13:07:31 -0500 Adam Chlipala Prose for Modules section
Wed, 09 Dec 2009 11:36:37 -0500 Adam Chlipala slow
Wed, 09 Dec 2009 11:06:39 -0500 Adam Chlipala New-rewrite-hint-breaks-old-script example
Mon, 07 Dec 2009 16:42:42 -0500 Adam Chlipala More maint & debug code
Mon, 07 Dec 2009 16:15:08 -0500 Adam Chlipala Start of maint & debug
Mon, 07 Dec 2009 10:54:43 -0500 Adam Chlipala More anti-patterns
Fri, 04 Dec 2009 16:58:30 -0500 Adam Chlipala First part of 'Ltac Anti-Patterns'
Fri, 04 Dec 2009 13:44:05 -0500 Adam Chlipala Uncommented functor example
Mon, 30 Nov 2009 15:41:51 -0500 Adam Chlipala Working with evars
Mon, 30 Nov 2009 14:21:34 -0500 Adam Chlipala Mention fake universe polymorphism
Tue, 24 Nov 2009 07:54:38 -0500 Adam Chlipala Fix typo
Mon, 23 Nov 2009 12:41:14 -0500 Adam Chlipala New release
Mon, 23 Nov 2009 11:33:22 -0500 Adam Chlipala Axioms
Fri, 20 Nov 2009 11:02:26 -0500 Adam Chlipala Prop section
Fri, 20 Nov 2009 10:18:35 -0500 Adam Chlipala Proof-reading pass through first bit of Universes
Wed, 18 Nov 2009 15:38:01 -0500 Adam Chlipala Update DataStruct with a new reason to use reflexive types; start Universes
Mon, 16 Nov 2009 13:27:34 -0500 Adam Chlipala First 8.2 release
Mon, 16 Nov 2009 13:13:34 -0500 Adam Chlipala Fix Extensional type annotations
Mon, 16 Nov 2009 12:30:38 -0500 Adam Chlipala Port Extensional
Mon, 16 Nov 2009 12:18:55 -0500 Adam Chlipala Port Interps
Mon, 16 Nov 2009 12:08:18 -0500 Adam Chlipala Port Hoas
Mon, 16 Nov 2009 11:09:47 -0500 Adam Chlipala Port Reflection
Mon, 16 Nov 2009 10:32:04 -0500 Adam Chlipala Ported Match
Fri, 13 Nov 2009 12:03:08 -0500 Adam Chlipala Port Generic
Wed, 11 Nov 2009 15:12:40 -0500 Adam Chlipala Ported Equality
Wed, 11 Nov 2009 14:34:24 -0500 Adam Chlipala Touch-ups to DataStruct
Wed, 11 Nov 2009 14:28:47 -0500 Adam Chlipala Switch DepList to inductive, not recursive, types
Wed, 11 Nov 2009 14:00:04 -0500 Adam Chlipala Port DataStruct
Wed, 11 Nov 2009 12:21:28 -0500 Adam Chlipala Finish porting MoreDep
Wed, 11 Nov 2009 10:27:47 -0500 Adam Chlipala Start of MoreDep port; new [dep_destruct] based on [dependent destruction]
Mon, 09 Nov 2009 15:43:56 -0500 Adam Chlipala Ported Subset
Mon, 09 Nov 2009 14:48:46 -0500 Adam Chlipala Ported Coinductive
Mon, 09 Nov 2009 13:18:46 -0500 Adam Chlipala Most old Sestoft suggestions processed
Mon, 09 Nov 2009 11:48:27 -0500 Adam Chlipala Port Predicates
Mon, 09 Nov 2009 11:09:50 -0500 Adam Chlipala Port InductiveTypes
Fri, 06 Nov 2009 17:10:27 -0500 Adam Chlipala Converted StackMachine
Fri, 06 Nov 2009 16:44:06 -0500 Adam Chlipala Revising for 8.2 through first big example
Fri, 06 Nov 2009 12:15:05 -0500 Adam Chlipala 'make doc' works with 8.2
Fri, 06 Nov 2009 10:52:43 -0500 Adam Chlipala Parts I want to keep compile with 8.2
Sun, 04 Jan 2009 08:18:59 -0500 Adam Chlipala Quibbly note on [eq] in first-order logic
Sat, 03 Jan 2009 19:57:02 -0500 Adam Chlipala Feedback from Peter Gammie
Fri, 02 Jan 2009 09:09:35 -0500 Adam Chlipala Typo reported by mulhern; stop publishing to Harvard
Fri, 02 Jan 2009 08:57:25 -0500 Adam Chlipala Small fixes while reading student solutions
Mon, 01 Dec 2008 08:32:20 -0500 Adam Chlipala Fix typo
Fri, 28 Nov 2008 14:21:38 -0500 Adam Chlipala Templatize Generic
Fri, 28 Nov 2008 14:10:23 -0500 Adam Chlipala map_id
Fri, 28 Nov 2008 13:38:34 -0500 Adam Chlipala size_positive
Fri, 28 Nov 2008 11:42:07 -0500 Adam Chlipala Pretty-printing
Fri, 28 Nov 2008 11:21:01 -0500 Adam Chlipala Generic size examples
Fri, 28 Nov 2008 09:55:56 -0500 Adam Chlipala Start of Generic
Tue, 18 Nov 2008 13:09:09 -0500 Adam Chlipala Templatize Impure
Tue, 18 Nov 2008 13:04:39 -0500 Adam Chlipala Impredicative Impure example
Tue, 18 Nov 2008 12:44:46 -0500 Adam Chlipala Import predicative Impure example
Mon, 17 Nov 2008 10:36:02 -0500 Adam Chlipala Automated CcExp_correct
Mon, 17 Nov 2008 10:31:22 -0500 Adam Chlipala Automated ccExp_correct
Mon, 17 Nov 2008 10:22:40 -0500 Adam Chlipala Close to automated ccExp_correct
Sun, 16 Nov 2008 19:58:01 -0500 Adam Chlipala CcExp_correct
Sun, 16 Nov 2008 19:42:32 -0500 Adam Chlipala ccTerm_correct
Sun, 16 Nov 2008 15:04:21 -0500 Adam Chlipala About to stop using JMeq
Sun, 16 Nov 2008 14:01:33 -0500 Adam Chlipala Closure conversion defined
Sun, 16 Nov 2008 11:54:51 -0500 Adam Chlipala Start of Intensional
Mon, 10 Nov 2008 17:27:55 -0500 Adam Chlipala Extensional exercise
Mon, 10 Nov 2008 14:17:26 -0500 Adam Chlipala Templatize Extensional
Mon, 10 Nov 2008 14:12:22 -0500 Adam Chlipala PatMatch Elaborate_correct
Mon, 10 Nov 2008 12:19:47 -0500 Adam Chlipala PatMatch Elaborate
Mon, 10 Nov 2008 12:02:03 -0500 Adam Chlipala Languages for PatMatch
Mon, 10 Nov 2008 11:36:00 -0500 Adam Chlipala CpsExp_correct
Mon, 10 Nov 2008 11:05:49 -0500 Adam Chlipala STLC cpsExp
Sun, 09 Nov 2008 15:23:33 -0500 Adam Chlipala Templatize Interps
Sun, 09 Nov 2008 15:15:41 -0500 Adam Chlipala System F
Sun, 09 Nov 2008 14:24:31 -0500 Adam Chlipala Examples; pair optimization
Sun, 09 Nov 2008 13:59:51 -0500 Adam Chlipala PSLC
Sun, 09 Nov 2008 13:44:31 -0500 Adam Chlipala STLC example in Interps
Wed, 05 Nov 2008 09:39:00 -0500 Adam Chlipala Templatize Hoas
Wed, 05 Nov 2008 09:32:19 -0500 Adam Chlipala Remove unnecessary imports
Wed, 05 Nov 2008 09:29:15 -0500 Adam Chlipala Cleaning up BigStep proofs
Wed, 05 Nov 2008 09:21:11 -0500 Adam Chlipala More easy syntactic examples
Wed, 05 Nov 2008 08:56:11 -0500 Adam Chlipala About to remove Cfold stuff
Tue, 04 Nov 2008 18:34:31 -0500 Adam Chlipala Cfold_correct, with a handful of cheating in the substitution lemma
Tue, 04 Nov 2008 16:45:50 -0500 Adam Chlipala Feeling stuck with Hoas
Tue, 04 Nov 2008 12:39:28 -0500 Adam Chlipala Evaluation contexts ahoy
Tue, 04 Nov 2008 11:23:20 -0500 Adam Chlipala Firstorder clean-ups after class
Mon, 03 Nov 2008 14:47:46 -0500 Adam Chlipala Interderivability of big and small step
Mon, 03 Nov 2008 09:50:22 -0500 Adam Chlipala Add Plus
Mon, 03 Nov 2008 09:43:32 -0500 Adam Chlipala Hoas, up to type soundness
Sun, 02 Nov 2008 14:41:01 -0500 Adam Chlipala Simplify Concrete
Sun, 02 Nov 2008 13:51:51 -0500 Adam Chlipala De Bruijn
Sun, 02 Nov 2008 13:25:42 -0500 Adam Chlipala Removed G2 everywhere
Sun, 02 Nov 2008 13:14:08 -0500 Adam Chlipala Progress and preservation
Sun, 02 Nov 2008 12:20:56 -0500 Adam Chlipala Fix some uglyness
Sun, 02 Nov 2008 12:16:55 -0500 Adam Chlipala Proved concrete substitution
Wed, 29 Oct 2008 17:50:09 -0400 Adam Chlipala a -> an
Wed, 29 Oct 2008 17:41:38 -0400 Adam Chlipala Reflection exercise
Wed, 29 Oct 2008 14:39:00 -0400 Adam Chlipala Reflection exercise
Tue, 28 Oct 2008 17:03:25 -0400 Adam Chlipala Templatize Reflection
Tue, 28 Oct 2008 16:31:55 -0400 Adam Chlipala my_tauto prose
Tue, 28 Oct 2008 15:50:44 -0400 Adam Chlipala monoid prose
Tue, 28 Oct 2008 15:28:52 -0400 Adam Chlipala Monoid code
Tue, 28 Oct 2008 14:28:22 -0400 Adam Chlipala Code for my_tauto
Tue, 28 Oct 2008 13:19:33 -0400 Adam Chlipala Trivial tautologies
Tue, 28 Oct 2008 11:29:14 -0400 Adam Chlipala Start of Reflection
Mon, 27 Oct 2008 10:31:57 -0400 Adam Chlipala Templatize Match
Mon, 27 Oct 2008 10:09:10 -0400 Adam Chlipala Prose for matcher
Sun, 26 Oct 2008 17:10:20 -0400 Adam Chlipala inster example
Sun, 26 Oct 2008 16:45:19 -0400 Adam Chlipala Uncommented matcher code
Sun, 26 Oct 2008 15:18:13 -0400 Adam Chlipala Functional programming in Ltac
Sun, 26 Oct 2008 14:39:21 -0400 Adam Chlipala Free variables in unification variables issue
Sun, 26 Oct 2008 14:11:41 -0400 Adam Chlipala Through completer'
Sun, 26 Oct 2008 11:13:43 -0400 Adam Chlipala autorewrite
Sun, 26 Oct 2008 10:28:00 -0400 Adam Chlipala auto
Wed, 22 Oct 2008 14:32:41 -0400 Adam Chlipala Start of Match
Wed, 22 Oct 2008 13:40:32 -0400 Adam Chlipala call-by-name is really call-by-need
Wed, 22 Oct 2008 09:43:37 -0400 Adam Chlipala Clarify intent to use hlist
Wed, 22 Oct 2008 07:50:47 -0400 Adam Chlipala s/reflexive/index function
Mon, 20 Oct 2008 17:02:04 -0400 Adam Chlipala s/itree/htree
Mon, 20 Oct 2008 14:03:08 -0400 Adam Chlipala Equality exercise
Mon, 20 Oct 2008 12:17:39 -0400 Adam Chlipala More DepList notations
Mon, 20 Oct 2008 10:44:20 -0400 Adam Chlipala Add ext_eq axiom and DepList notations
Mon, 20 Oct 2008 09:11:54 -0400 Adam Chlipala Templatize Equality
Sat, 18 Oct 2008 17:36:08 -0400 Adam Chlipala ext_eq
Sat, 18 Oct 2008 15:32:59 -0400 Adam Chlipala Definitional equality
Sat, 18 Oct 2008 14:55:52 -0400 Adam Chlipala Interconvertibility
Sat, 18 Oct 2008 14:24:11 -0400 Adam Chlipala JMeq
Sat, 18 Oct 2008 13:52:09 -0400 Adam Chlipala Proofs with equality
Sat, 18 Oct 2008 12:04:28 -0400 Adam Chlipala Up to Streicher
Tue, 14 Oct 2008 15:21:02 -0400 Adam Chlipala Clarify exercise wording
Tue, 14 Oct 2008 15:11:14 -0400 Adam Chlipala Pattern-matching exercise
Tue, 14 Oct 2008 14:58:33 -0400 Adam Chlipala itree exercise
Tue, 14 Oct 2008 14:49:51 -0400 Adam Chlipala DepList
Tue, 14 Oct 2008 13:05:43 -0400 Adam Chlipala Templatize DataStruct
Tue, 14 Oct 2008 11:28:44 -0400 Adam Chlipala Commentary on cond example
Tue, 14 Oct 2008 10:52:38 -0400 Adam Chlipala Code for cond-folding example
Mon, 13 Oct 2008 15:09:58 -0400 Adam Chlipala Index functions
Mon, 13 Oct 2008 14:04:39 -0400 Adam Chlipala Recursive type definitions
Mon, 13 Oct 2008 13:20:57 -0400 Adam Chlipala STLC interp
Mon, 13 Oct 2008 12:35:48 -0400 Adam Chlipala hlist and hget
Mon, 13 Oct 2008 11:59:20 -0400 Adam Chlipala Commentary on ilist get
Mon, 13 Oct 2008 10:47:21 -0400 Adam Chlipala Start of DataStruct
Sun, 12 Oct 2008 08:44:23 -0400 Adam Chlipala s/stream/tree
Wed, 08 Oct 2008 14:22:47 -0400 Adam Chlipala Fix red-black section heading
Wed, 08 Oct 2008 14:18:35 -0400 Adam Chlipala Add a darn newline
Wed, 08 Oct 2008 13:55:20 -0400 Adam Chlipala Exercise added at end of MoreDep
Wed, 08 Oct 2008 10:01:26 -0400 Adam Chlipala Templatize MoreDep
Wed, 08 Oct 2008 09:41:50 -0400 Adam Chlipala crush' pursues trivial inversions
Tue, 07 Oct 2008 22:14:39 -0400 Adam Chlipala Prettify rbtree a bit more
Tue, 07 Oct 2008 22:05:37 -0400 Adam Chlipala Prettify rbtree a bit
Tue, 07 Oct 2008 21:58:45 -0400 Adam Chlipala Move [present] section earlier
Tue, 07 Oct 2008 21:49:35 -0400 Adam Chlipala Correctness of insertion
Tue, 07 Oct 2008 20:15:12 -0400 Adam Chlipala Red-black insert
Tue, 07 Oct 2008 16:50:46 -0400 Adam Chlipala Comment regexp matcher
Tue, 07 Oct 2008 16:08:58 -0400 Adam Chlipala Finish automating regexp
Tue, 07 Oct 2008 14:52:15 -0400 Adam Chlipala Add star to regexp matcher; need to automate a bit more
Tue, 07 Oct 2008 10:50:36 -0400 Adam Chlipala Remove -impredicative-set from text
Tue, 07 Oct 2008 10:49:07 -0400 Adam Chlipala Remove -impredicative-set
Tue, 07 Oct 2008 10:43:54 -0400 Adam Chlipala Get Coinductive compiling again
Mon, 06 Oct 2008 14:41:13 -0400 Adam Chlipala Add 'Or' to regexp matcher
Mon, 06 Oct 2008 14:33:11 -0400 Adam Chlipala Start of certified regexp matcher