Agenda Structural Challenge Canonical physics structural-challenge, physics, cosmology-dark-sector, R2_quantitative_falsification Horizon problem — see briefing 01 §7 for full structural framing.
Physics Structural Challenge Ledger

Horizon problem

P037 external imported cosmology dark sector R2 quantitative falsification External: externally open τ response: structurally constrained

Horizon problem — see briefing 01 §7 for full structural framing.

See the paired Horizon problem — Challenge Response on the Results lane for the program's current response status, registry evidence, verification route, and external-review boundary.

Current status: structurally constrained.

Challenge statement

Horizon problem — see briefing 01 §7 for full structural framing.

Why this challenge is in the ledger

Migrated from v1 problem-ledger entry phys-horizon-problem. Per briefing 01 §7, classified as ring R2_quantitative_falsification in cluster cosmology-dark-sector with physics-core-weight core.

Bibliography clusters whose prior art bears on this page. Each cluster links to its representative references and to the broader Deep Comparison briefing.

Source: prior-art cluster index · canonical data lives in corpus/data/bibliography/prior-art-clusters.yml

First reviewer questions

  1. Does τ produce extensional results for Horizon problem?
  2. Is the assigned cluster + ring depth structurally accurate per briefing 01 §7?
  3. Should this item carry cross-domain links (Wave 6 wires those)?

Source anchors

Source anchors are background references, not endorsements of Panta Rhei claims.

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