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0.2-1.2 by G Grothendieck, 5 years ago
http://rsympy.googlecode.com
Browse source code at https://github.com/cran/rSymPy
Authors: G Grothendieck (SymPy itself is by Ondrej Certik and others) , Contributors: Carlos J. Gil Bellosta
Documentation: PDF Manual
GPL license
Depends on rJython
See at CRAN