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Solution of the Mumford-Shah conjecture
Abstract
We prove the Mumford--Shah conjecture, formulated in 1989, by completing the classification of blow-up limits of minimizers in the plane. The remaining case concerns limits whose discontinuity set is noncompact and has connected complement. In this setting, we rule out bounded connected components using second-variation inequalities obtained from combined inner and outer variations associated with two perpendicular translations of a compact subset separated from the rest of the discontinuity set. Established results then imply that the discontinuity set is connected, and the known classification for connected discontinuity sets completes the proof.
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BibTeX
@misc{deangelis2026solution,
title = {{Solution of the Mumford-Shah conjecture}},
author = {Francesco Deangelis},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2609.26732},
eprint = {2609.26732},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.26732},
}
RIS
TY - UNPB
TI - Solution of the Mumford-Shah conjecture
AU - Francesco Deangelis
PY - 2026
DA - 2026/10/05
PB - arXiv
DO - 10.48550/arxiv.2609.26732
UR - https://arxiv.org/abs/2609.26732
AB - We prove the Mumford--Shah conjecture, formulated in 1989, by completing the classification of blow-up limits of minimizers in the plane. The remaining case concerns limits whose discontinuity set is noncompact and has connected complement. In this setting, we rule out bounded connected components using second-variation inequalities obtained from combined inner and outer variations associated with two perpendicular translations of a compact subset separated from the rest of the discontinuity set. Established results then imply that the discontinuity set is connected, and the known classification for connected discontinuity sets completes the proof.
ER -