X-Git-Url: http://matita.cs.unibo.it/gitweb/?p=helm.git;a=blobdiff_plain;f=helm%2Fwww%2Flambdadelta%2Fweb%2Fhome%2Fspecification.ldw.xml;h=c58b253a82f0fd6a6cabe3f58105f4ed55d87914;hp=556549c393d00f5190ddc0d40f9f3c4440c27379;hb=ff612dc35167ec0c145864c9aa8ae5e1ebe20a48;hpb=e90313fa853ba63f29416c2d0de40b13c913e567 diff --git a/helm/www/lambdadelta/web/home/specification.ldw.xml b/helm/www/lambdadelta/web/home/specification.ldw.xml index 556549c39..c58b253a8 100644 --- a/helm/www/lambdadelta/web/home/specification.ldw.xml +++ b/helm/www/lambdadelta/web/home/specification.ldw.xml @@ -3,27 +3,27 @@ - Computer-checked formal specifications + Computer-checked formal specifications - λδ is developed as a machine-checked digital specification. - It comes in several versions listed in the next table, - which includes the major milestones. + The systems of the λδ family are developed as machine-checked digital specifications, + and are listed in the next table, which includes the major milestones. The life cycle of a specification consists of four periods. - + the definitions are designed and the major propositions are proved, then the calculus is announced with a presentation. - + major changes and additions may occur before the calculus is released on paper. - + subsequent improvements occur until the specification is completed or superseded, while major changes and additions are announced and reported on paper. - + after its conclusion, the specification is modified just for maintenance. @@ -31,23 +31,31 @@ Informational pages on the specifications are provided. - - + + nodes are counted according to the "intrinsic complexity measure" [F. Guidi: "Procedural Representation of CIC Proof Terms" Journal of Automated Reasoning 44(1-2), Springer (February 2010), pp. 53-78]. - - + + from the logical standpoint, the source scripts are grouped in "planes" and these are grouped in "components"; the notation for the relations or functions introduced in each script, is shown in parentheses (? are placeholders). + + + λδ version 3 (proposed) + + The formal specification of λδ version 3 + is forthcoming. + + - λδ version 2 (active) + λδ version 2 (active) The formal specification of λδ version 2 is available in the following formats: @@ -55,15 +63,16 @@ - lambdadelta_2 for Matita 0.99.2 - (revised ). - Source scripts. + lambdadelta_2A1 for Matita 0.99.2 + (revised ). + Source scripts [Svn revision: 12964]. + Documentation (R2c). The scripts are grouped in directories, first by part, then by component. - + the scripts are checked by the latest version of Matita from HELM Subversion repository at path <trunk/matita/>. @@ -72,14 +81,15 @@ Informational pages on the parts of the specification: - Background, - Core, - Applications. + Background, + Syntax, + Core, + Applications. - λδ version 1 (superseded) + λδ version 1 (superseded) The formal specification of λδ version 1 is available in the following formats: @@ -88,10 +98,11 @@ lambdadelta_1 for Coq 7.3.1 - (revised ). + (revised ). Source scripts. + Documentation (J1a). - + 17 new lemmas and former lemma "eq_nat_dec" renamed as "nat_dec_neg". @@ -102,7 +113,7 @@ lambdadelta_1 for Matita 0.5 - (revised ). + (revised ). Static HTML pages generated by the HELM rendering engine. @@ -129,15 +140,15 @@ lambdadelta_1 for Matita 0.5 - (revised ). + (revised ). HELM directory. - + Informational pages on the parts of the specification: - Background, - Core. + Background, + Core.