We present a Maple and GRTensorIII-based symbolic calculator for instanton metrics using Newman-Penrose formalism.
IMPORTANT: THE CODE NEEDS THE EXTERNAL PACKAGE GRTENSOR III.
Gravitational instantons are exact solutions of Einstein's vacuum field equations with Euclidean signature. The Newman-Penrose formalism, which supplies a toolbox for studying the exact solutions of Einstein's field equations, was adopted to the instanton case and our code translates it for computational use.
The files:
-
npinstanton.mws: The main file
-
eguchihanson: Sample input file containing the information of Eguchi-Hanson instanton
-
Tutorial.txt: Help file containing the primary information
-
The file NPInstanton_for_Maple11.zip is the first version of the package that runs on Maple 11 and GRTensor II.
The article https://arxiv.org/abs/0711.0613 involves a review of the theory and the code.
Any questions or comments are welcome: birkandant@itu.edu.tr