Skip to content
GitLab
Projects Groups Snippets
  • /
  • Help
    • Help
    • Support
    • Community forum
    • Submit feedback
    • Contribute to GitLab
  • Sign in / Register
  • S stdpp
  • Project information
    • Project information
    • Activity
    • Labels
    • Members
  • Repository
    • Repository
    • Files
    • Commits
    • Branches
    • Tags
    • Contributors
    • Graph
    • Compare
  • Issues 81
    • Issues 81
    • List
    • Boards
    • Service Desk
    • Milestones
  • Merge requests 10
    • Merge requests 10
  • CI/CD
    • CI/CD
    • Pipelines
    • Jobs
    • Schedules
  • Deployments
    • Deployments
    • Releases
  • Analytics
    • Analytics
    • Value stream
    • CI/CD
    • Repository
  • Wiki
    • Wiki
  • Activity
  • Graph
  • Create a new issue
  • Jobs
  • Commits
  • Issue Boards
Collapse sidebar
  • Iris
  • stdpp
  • Merge requests
  • !417

Add lemmas `set_fold_union_strong` and `set_fold_union`.

  • Review changes

  • Download
  • Email patches
  • Plain diff
Open Robbert Krebbers requested to merge robbert/set_fold_union into master Sep 23, 2022
  • Overview 10
  • Commits 3
  • Pipelines 3
  • Changes 2

This discussion at Mattermost nerdsniped me to add the lemma set_fold_union and the stronger lemma set_fold_union_strong that only requires idempotence/associativity/commutativity for the elements in the sets.

Interestingly, the already existing "disjoint" versions of the lemma can be derived.

The proofs are pretty long/tricky, so I tried to add some comments what's going on.

Assignee
Assign to
Reviewers
Request review from
Time tracking
Source branch: robbert/set_fold_union