Pith Number

pith:QHRK6CMV

pith:2011:QHRK6CMV4PQBMMNRMKEG2IU42L

not attested not anchored not stored refs pending

Pseudo-jump inversion and SJT-hard sets

Noam Greenberg, Rodney G. Downey

arxiv:1109.6752 v1 · 2011-09-30 · 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{QHRK6CMV4PQBMMNRMKEG2IU42L}

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	2026-05-18T04:11:52.540707Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

81e2af0995e3e01631b162886d229cd2ca99257261e76c7f260c06af40e24cc1

Aliases

arxiv: 1109.6752 · arxiv_version: 1109.6752v1 · doi: 10.48550/arxiv.1109.6752 · pith_short_12: QHRK6CMV4PQB · pith_short_16: QHRK6CMV4PQBMMNR · pith_short_8: QHRK6CMV

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/QHRK6CMV4PQBMMNRMKEG2IU42L \
  | 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: 81e2af0995e3e01631b162886d229cd2ca99257261e76c7f260c06af40e24cc1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5fa122ecdbaa4b430b57635378a713d9a91785f76d6760fa69e5aef07a9ddccb",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.LO",
    "submitted_at": "2011-09-30T08:40:39Z",
    "title_canon_sha256": "6567f23135ad4a28aaae55ba6d3380d07e5529ccf358bcbfe07475aed2ee2233"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1109.6752",
    "kind": "arxiv",
    "version": 1
  }
}