X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Fwww%2Flambdadelta%2Fweb%2Fhome%2Fspecification.ldw.xml;h=a489b47a8f2ca93d61cea3d4d4a52ea84d1cbb91;hb=6b022cf2cccae67144ff045415e748b0b5c3a3d9;hp=dac9acf84c332d344afc281dc421d52d61d2e212;hpb=f10cfe417b6b8ec1c7ac85c6ecf5fb1b3fdf37db;p=helm.git diff --git a/helm/www/lambdadelta/web/home/specification.ldw.xml b/helm/www/lambdadelta/web/home/specification.ldw.xml index dac9acf84..a489b47a8 100644 --- a/helm/www/lambdadelta/web/home/specification.ldw.xml +++ b/helm/www/lambdadelta/web/home/specification.ldw.xml @@ -3,21 +3,50 @@ - 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 + + subsequent improvements occur until the specification is completed or superseded, + while major changes and additions are announced and reported on paper.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. + + 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 2 (ongoing) + λδ version 2 (active) The formal specification of λδ version 2 is available in the following formats: @@ -25,15 +54,16 @@ - lambdadelta_2 for Matita 0.99.2 - (revised ). + lambdadelta_2A1 for Matita 0.99.2 + (revised ). Source scripts. + 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/>. @@ -46,16 +76,10 @@ Core, Applications. - - - 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]. - - λδ version 1 (dismissed) + λδ version 1 (superseded) The formal specification of λδ version 1 is available in the following formats: @@ -64,8 +88,13 @@ 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". + The scripts are grouped in directories, one for each part. @@ -74,7 +103,7 @@ lambdadelta_1 for Matita 0.5 - (revised ). + (revised ). Static HTML pages generated by the HELM rendering engine. @@ -101,10 +130,16 @@ lambdadelta_1 for Matita 0.5 - (revised ). + (revised ). HELM directory. - + + + Informational pages on the parts of the specification: + Background, + Core. + +