Proving Bounds for Real Linear Programs in Isabelle/HOL

Author Steven Obua

Thumbnail PDF


  • Filesize: 106 kB
  • 2 pages

Document Identifiers

Author Details

Steven Obua

Cite AsGet BibTex

Steven Obua. Proving Bounds for Real Linear Programs in Isabelle/HOL. In Mathematics, Algorithms, Proofs. Dagstuhl Seminar Proceedings, Volume 5021, pp. 1-2, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2006)


Linear programming is a basic mathematical technique for optimizing a linear function on a domain that is constrained by linear inequalities. We restrict ourselves to linear programs on bounded domains that involve only real variables. In the context of theorem proving, this restriction makes it possible for any given linear program to obtain certificates from external linear programming tools that help to prove arbitrarily precise bounds for the given linear program. To this end, an explicit formalization of matrices in Isabelle/HOL is presented, and how the concept of lattice-ordered rings allows for a smooth integration of matrices with the axiomatic type classes of Isabelle. As our work is a contribution to the Flyspeck project, we demonstrate that via reflection and with the above techniques it is now possible to prove bounds for the linear programs arising in the proof of the Kepler conjecture sufficiently fast.
  • Certified proofs
  • Kepler conjecture


  • Access Statistics
  • Total Accesses (updated on a weekly basis)
    PDF Downloads
Questions / Remarks / Feedback

Feedback for Dagstuhl Publishing

Thanks for your feedback!

Feedback submitted

Could not send message

Please try again later or send an E-mail