The Formal Methods Team at NASA Langley Research Center and the National 
Institute of Aerospace is pleased to announce the release of the NASA PVS 
Library (NASALib) v7.1 (https://github.com/nasa/pvslib). NASALib v7.1 is fully 
compatible with PVS 7.1 (https://pvs.csl.sri.com), the recently released 
version of the Prototype Verification System (PVS). 
  
NASALib is a continuing collaborative effort that has spanned over 3 decades, 
to aid in research related to theorem proving  sponsored by NASA 
(https://shemesh.larc.nasa.gov/fm/pvs/). It consists of a collection of formal 
developments written in PVS, contributed by SRI, NASA, NIA, and the PVS 
community, and maintained by the NASA/NIA Formal Methods Team at LaRC. 
Currently, NASALib v7.1 includes 53 developments and almost 30k formally proved 
lemmas and theorems. 

In addition to NASALib v7.1, the following developments have been updated to 
PVS 7.1 and are publicly available  under NASA's Open Source Agreement:

* vscode-pvs (https://shemesh.larc.nasa.gov/fm/VSCode-PVS/): A Visual Studio 
Code (https://code.visualstudio.com/) extension that provides a modern 
integrated development environment for PVS.

* PRECiSA (https://shemesh.larc.nasa.gov/fm/PRECiSA): A static analysis tool 
that generates provably correct round-off error bounds of floating-point 
programs.

* PolyCARP (https://shemesh.larc.nasa.gov/fm/PolyCARP): A collection of 
formally verified algorithms for computations with polygons.

* CPR* (https://shemesh.larc.nasa.gov/fm/CPR): Formally verified 
implementations in C (fixed-point and floating-point) of ADS-B's Compact 
Position Reporting algorithms. CPR* is the reference implementation of CPR in 
the international standard ED-102B/DO-260C.

* DAIDALUS (https://shemesh.larc.nasa.gov/fm/DAIDALUS): A collection of 
formally verified algorithms for a detect and avoid concept that supports the 
integration of Unmanned Aircraft Systems (UAS) into the National Airspace 
System (NAS). DAIDALUS is the reference implementation of functional 
requirements for Detect and Avoid of UAS in the US standard DO-365A.

Enjoy,

The NASA/NIA Formal Methods Team at LaRC
https://shemesh.larc.nasa.gov/fm


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