Pith Number

pith:RUNWGD44

pith:2011:RUNWGD44FEODFGRUC5Z35TSCP6

not attested not anchored not stored refs pending

A proof for the decidability of HD0L ultimate periodicity

Ivan Mitrofanov

arxiv:1110.4780 v3 · 2011-10-21 · math.CO · math.LO

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{RUNWGD44FEODFGRUC5Z35TSCP6}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-05-18T03:50:48.662866Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8d1b630f9c291c329a341773bece427f918be67194004c7f01b2811d1a5a1da3

Aliases

arxiv: 1110.4780 · arxiv_version: 1110.4780v3 · doi: 10.48550/arxiv.1110.4780 · pith_short_12: RUNWGD44FEOD · pith_short_16: RUNWGD44FEODFGRU · pith_short_8: RUNWGD44

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/RUNWGD44FEODFGRUC5Z35TSCP6 \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 8d1b630f9c291c329a341773bece427f918be67194004c7f01b2811d1a5a1da3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cf91f2c9131021308fa97fdb5987cc532b0246c3a731e7f73b31f305f8ca6b5f",
    "cross_cats_sorted": [
      "math.LO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2011-10-21T12:52:47Z",
    "title_canon_sha256": "d1d31ca781a22598bfb62f5ec765462d174d054518ab497867098c9243a04f4a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1110.4780",
    "kind": "arxiv",
    "version": 3
  }
}