Tools

Tools $\lambda\delta butterfly$

Î»Î´ Digital Library (LDDL)

+ Open Symbolic Notation

- The Î»Î´ Digital Library is part of HELM - and contains resources expressed in Î»Î´. + Open Symbolic Notation, abbreviated OSN, + is an easy and flexible data-interchange text format + intended for the lightweight representation of + generic abstract syntax trees in the domain of formal systems. + Additional information will appear soon.

- Contents: - Landau's "Grundlagen der Analysis" - (from Jutting's specification in Automath). -

- Access: - static pages (updated 2015-01), - data set (updated 2014-12), - HELM server URL (updated 2014-12). -

- Examples: - - Grundlagen's definition "t234" - in Î»Î´ version 4. -

Helena

- Helena is a processor for Î»Î´, + Helena is a processor for the systems of the Î»Î´ family, implemented in Caml as a part of the HELM software, - meant for testing the stable features of the calculus as well as the unstable ones. + meant for testing both their stable and unstable features.

The processor source code is available in the directory @@ -147,10 +129,32 @@ of the HELM Svn repository. The Svn revisions containing the stable versions of Helena are indicated next.

+ Version 0.8.3 (2015-12). + Supports exportation to Î»Prolog + (two formats for ELPI, + and two formats for Teyjus). + Employs optimized conditional compilation through + camlp5 code preprocessor (pa_macro) + to reduce a performance loss, which is expected to disappear + by employing a different code preprocessor. + Overall validation speed of the "Grundlagen der Analysis" with respect to version 0.8.2: + +3% with optimized compilation, +5% without optimized compilation. + [Svn revision: 13108] (archived source code). +
- + 2015-06. + The corrected specification of Landau's "Grundlagen der Analysis" + is successfully validated in a Î»Prolog implementation of Î»Î´ version 3. +
+

Version 0.8.2 (2015-02). - Uses Î»Î´ "Version 3" with layer variables as core language. + Uses Î»Î´ version 3 with layer variables as core language. Supports exportation to Gallina (the specification language of Coq), and to Grafite @@ -180,12 +184,12 @@
2015-02. The translated specification of Landau's "Grundlagen der Analysis" - is successfully validated in Î»C by Coq 8.4.3. + is successfully validated in CC by Coq 8.4.3.
2014-12. The corrected specification of Landau's "Grundlagen der Analysis" - is successfully validated in Î»Î´ "Version 3". + is successfully validated in Î»Î´ version 3.

@@ -193,7 +197,7 @@

Version 0.8.1 (2010-11). - Uses a subset of Î»Î´ "Version 4" as intermediate language. + Uses a subset of Î»Î´ version 4 as intermediate language. Features importation from ".hln" files containing Î»Î´ textual syntax. The overall validation speed of the "Grundlagen der Analysis" increases of 22% with respect to version 0.8.0. @@ -217,7 +221,7 @@
- Version 0.8.0 (2009-09). - Supports Î»Î´ "Version 2" with naive implementation of impredicative sort inclusion. + Supports Î»Î´ version 2 with naive implementation of impredicative sort inclusion. Features importation from Automath and exportation to XML. Documentation (R2a). @@ -243,8 +247,37 @@

+ $[\lambda\delta digital library logo]$ Î»Î´ Digital Library (LDDL)

+ The Î»Î´ Digital Library is part of HELM + and contains resources expressed in the systems of the Î»Î´ family. +

+ Contents: + Landau's "Grundlagen der Analysis" + (from Jutting's specification in Automath). +

+ Access: + static pages (updated 2015-01), + data set (updated 2014-12), + HELM server URL (updated 2014-12). +

+ Examples: + + Grundlagen's definition "t234" + in Î»Î´ version 4. +

+ $\lambda\delta rainbow rule$

@@ -269,6 +302,6 @@

Last update: Fri, 07 Aug 2015 14:21:47 +0200

Last update: Fri, 08 Apr 2016 22:51:19 +0200