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 @@ -147,17 +129,39 @@ 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 (the specification language of Matita). The overall validation speed of the "Grundlagen der Analysis" increases of 34% with respect to version 0.8.1. - Documentation (J4). + Documentation (J3a). [Svn revision: 13035] (archived source code).
- @@ -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.

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. @@ -217,10 +221,10 @@
- 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 (R4). + Documentation (R2a). [Svn revision: 10304] (archived source code).
  - @@ -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: Sat, 21 Feb 2015 23:38:38 +0100
+
Last update: Sat, 16 Apr 2016 14:53:00 +0200