* (2019-11-25 04:21:19 UTC)*

# Packages matching: installed # Name # Installed # Synopsis base-bigarray base base-num base Num library distributed with the OCaml compiler base-threads base base-unix base camlp5 7.10 Preprocessor-pretty-printer of OCaml conf-findutils 1 Virtual package relying on findutils conf-m4 1 Virtual package relying on m4 coq 8.8.2 Formal proof management system. num 0 The Num library for arbitrary-precision integer and rational arithmetic ocaml 4.05.0 The OCaml compiler (virtual package) ocaml-base-compiler 4.05.0 Official 4.05.0 release ocaml-config 1 OCaml Switch Configuration ocamlfind 1.8.1 A library manager for OCaml # opam file: opam-version: "2.0" maintainer: "Hugo.Herbelin@inria.fr" homepage: "https://github.com/coq-contribs/zfc" license: "LGPL 2.1" build: [make "-j%{jobs}%"] install: [make "install"] remove: ["rm" "-R" "%{lib}%/coq/user-contrib/ZFC"] depends: [ "ocaml" "coq" {>= "8.7" & < "8.8~"} ] tags: [ "keyword: Set Theory" "keyword: Zermelo-Fraenkel" "keyword: Calculus of Inductive Constructions" "category: Mathematics/Logic/Set theory" ] authors: [ "Benjamin Werner" ] bug-reports: "https://github.com/coq-contribs/zfc/issues" dev-repo: "git+https://github.com/coq-contribs/zfc.git" synopsis: "An encoding of Zermelo-Fraenkel Set Theory in Coq" description: """ The encoding of Zermelo-Fraenkel Set Theory is largely inspired by Peter Aczel's work dating back to the eighties. A type Ens is defined, which represents sets. Two predicates IN and EQ stand for membership and extensional equality between sets. The axioms of ZFC are then proved and thus appear as theorems in the development. A main motivation for this work is the comparison of the respective expressive power of Coq and ZFC. A non-computational type-theoretical axiom of choice is necessary to prove the replacement schemata and the set-theoretical AC. The main difference between this work and Peter Aczel's is that propositions are defined on the impredicative level Prop. Since the definition of Ens is, however, still unchanged, I also added most of Peter Aczel's definition. The main advantage of Aczel's approach is a more constructive vision of the existential quantifier (which gives the set-theoretical axiom of choice for free).""" flags: light-uninstall url { src: "https://github.com/coq-contribs/zfc/archive/v8.7.0.tar.gz" checksum: "md5=df3d5e558ec4b88676252dfb41500683" }

- Command
`true`

- Return code
- 0

Dry install with the current Coq version:

- Command
`opam install -y --show-action coq-zfc.8.7.0 coq.8.8.2`

- Return code
- 5120
- Output
[NOTE] Package coq is already installed (current version is 8.8.2). The following dependencies couldn't be met: - coq-zfc -> coq < 8.8~ -> ocaml < 4.03.0 base of this switch (use `--unlock-base' to force) Your request can't be satisfied: - No available version of coq satisfies the constraints No solution found, exiting

Dry install without Coq/switch base, to test if the problem was incompatibility with the current Coq/OCaml version:

- Command
`opam remove -y coq; opam install -y --show-action --unlock-base coq-zfc.8.7.0`

- Return code
- 0

- Command
`true`

- Return code
- 0
- Duration
- 0 s

- Command
`true`

- Return code
- 0
- Duration
- 0 s

No files were installed.

- Command
`true`

- Return code
- 0
- Missing removes
- none
- Wrong removes
- none