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| author | Hugo Herbelin | 2019-10-27 19:12:36 +0100 |
|---|---|---|
| committer | Hugo Herbelin | 2019-10-27 19:12:36 +0100 |
| commit | 943dcfec49b38267488e01cc680fa456739b92cc (patch) | |
| tree | ef23b87facfb11eaee0014ed2dadd5d17ae5b3b0 /doc/changelog | |
| parent | f508ddcd2cfff152b8d6291d96e4b87ef9fe2ff9 (diff) | |
| parent | c690a68ba0b78b913cbcb60f7508d431071d4c79 (diff) | |
Merge PR #10827: Replace classical reals quotient axioms by functional extensionality
Ack-by: JasonGross
Ack-by: Zimmi48
Ack-by: herbelin
Ack-by: maximedenes
Diffstat (limited to 'doc/changelog')
| -rw-r--r-- | doc/changelog/10-standard-library/10827-dedekind-reals.rst | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/doc/changelog/10-standard-library/10827-dedekind-reals.rst b/doc/changelog/10-standard-library/10827-dedekind-reals.rst new file mode 100644 index 0000000000..5d8467025b --- /dev/null +++ b/doc/changelog/10-standard-library/10827-dedekind-reals.rst @@ -0,0 +1,11 @@ +- New module `Reals.ClassicalDedekindReals` defines Dedekind real numbers + as boolean-values functions along with 3 logical axioms: limited principle + of omniscience, excluded middle of negations and functional extensionality. + The exposed type :g:`R` in module :g:`Reals.Rdefinitions` is those + Dedekind reals, hidden behind an opaque module. + Classical Dedekind reals are a quotient of constructive reals, which allows + to transport many constructive proofs to the classical case. + + See `#10827 <https://github.com/coq/coq/pull/10827>`_, by Vincent Semeria, + based on discussions with Guillaume Melquiond, Bas Spitters and Hugo Herbelin, + code review by Hugo Herbelin. |