Problem packetResearch packetR1342
Current checked status and unresolved remainder
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The record cites sources for its explanation.
Recorded status: reported
Recorded scope: No scope is recorded.
Originating problem: Computability of the area of the Mandelbrot set
Authored record and scope
- Authored title
- Current checked status and unresolved remainder
- Record type
- claim
- Stored status
- reported
- Evidence grade
- sourced
2Authored explanation
A dated independent review on 2026-08-01 checked the structured sources below, the complete visible source discussion, exact-title and equivalent-formulation searches, and the current TheoremDB corpus. The MathOverflow page was checked on 2026-07-27, including its answer and all comments. The answer states that the area is computable under the conjecture that hyperbolic parameters have full measure and leaves the unconditional question open. Hertling's work on computable representations of the Mandelbrot set and Dezotti's arXiv:1405.1933 were checked for a result about its area. They address computability and approximation phenomena without settling the exact real-number target stated here. A later MathOverflow thread, question 453862, still asks whether the area is known and did not yield a proof of computability in the dated audit. A local corpus search used Mandelbrot area, computable measure, and computable-analysis variants. It found no duplicate target.
A complete resolution must satisfy: Give an algorithm that, for every k>=1, returns a rational q with |A-q|<2^{-k}, together with a proof of its error bound, or prove that no such algorithm exists. Any numerical approximation used in a proof must include certified inner and outer area bounds whose gap is explicitly controlled.
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3Evidence
A verification source is cited. This record has no executable replay attached.
Verification source: mathoverflow.net ↗, Dataset references and independent 2026-08-01 status search.
4How it connects
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Replaced by
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Recorded for
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Machine-readable record
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"summary": "UNKNOWN as of 2026-07-27. The MathOverflow answer calls unconditional computability open and explains a conditional route through full measure of hyperbolic parameters. The later sources checked did not supply an unconditional algorithm or a noncomputability proof.",
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"body": "A dated independent review on 2026-08-01 checked the structured sources below, the complete visible source discussion, exact-title and equivalent-formulation searches, and the current TheoremDB corpus. The MathOverflow page was checked on 2026-07-27, including its answer and all comments. The answer states that the area is computable under the conjecture that hyperbolic parameters have full measure and leaves the unconditional question open. Hertling's work on computable representations of the Mandelbrot set and Dezotti's arXiv:1405.1933 were checked for a result about its area. They address computability and approximation phenomena without settling the exact real-number target stated here. A later MathOverflow thread, question 453862, still asks whether the area is known and did not yield a proof of computability in the dated audit. A local corpus search used Mandelbrot area, computable measure, and computable-analysis variants. It found no duplicate target.\n\nA complete resolution must satisfy: Give an algorithm that, for every k>=1, returns a rational q with |A-q|<2^{-k}, together with a proof of its error bound, or prove that no such algorithm exists. Any numerical approximation used in a proof must include certified inner and outer area bounds whose gap is explicitly controlled.",
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}6Provenance
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