X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Fwww%2Flambdadelta%2Fweb%2Fhome%2Fspecification.ldw.xml;h=969e3fd004acbf792c91ab4910b29f5683f01a07;hb=bc389dd4724959688aafc1ede450794f47b8d0b5;hp=407dc8054550060e7fe9688a9863bfd28db68804;hpb=a38bbd2c8213d8275a3d3c2ac115c45c8e478ed4;p=helm.git diff --git a/helm/www/lambdadelta/web/home/specification.ldw.xml b/helm/www/lambdadelta/web/home/specification.ldw.xml index 407dc8054..969e3fd00 100644 --- a/helm/www/lambdadelta/web/home/specification.ldw.xml +++ b/helm/www/lambdadelta/web/home/specification.ldw.xml @@ -3,27 +3,26 @@ 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 - + subsequent improvements occur until the specification is completed or superseded, while major changes and additions are announced and reported on paper.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. @@ -31,20 +30,28 @@ 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) @@ -55,15 +62,16 @@ - 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/>. @@ -88,10 +96,11 @@ 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 +111,7 @@ lambdadelta_1 for Matita 0.5 - (revised ). + (revised ). Static HTML pages generated by the HELM rendering engine. @@ -129,9 +138,9 @@ lambdadelta_1 for Matita 0.5 - (revised ). + (revised ). HELM directory. - +