trac #15482: Say very loud that LP variables are positive by default
trac #15482: addressing the reviewer's comments
trac #15482: Scream where I had not thought of screaming before
trac #15482: shortening a line
trac #15482: positive -> non-negative
trac #15482: a broken doctest
trac #15482: rebase on 5.13.rc0
fixing building of R extensions on ARM
trac #15787: removing libptcblas and libptf77blas from the list of mandatory ATLAS files
trac #15482: Rebase on 6.2.beta0
trac #15345 first step: coercion of Laurent polynomials into fractions
mpmath: upgrade to version 0.18
trac #15345 corrected code
trac #15345 better coercion
trac #15345 documentation added
trac #15668 implement fixed simplicial complex
trac #15668 more general input is allowed
trac #15668 added a basic example + correct raise syntax for python3
trac #15668 correct algo ?
trac #15668 more doc