Pith Number

pith:2RXP3GUT

pith:2019:2RXP3GUTPBFVMBAQBCJ3LIIYCM

not attested not anchored not stored refs pending

Towards Finding Longer Proofs

Adri\'an Csisz\'arik, Cezary Kaliszyk, Henryk Michalewski, Josef Urban, Zsolt Zombori

arxiv:1905.13100 v2 · 2019-05-30 · cs.LO · cs.AI · cs.LG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{2RXP3GUTPBFVMBAQBCJ3LIIYCM}

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	2026-07-05T02:52:55.904398Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d46efd9a93784b5604100893b5a118133d5db9014010fcdb3eee2a053539c87b

Aliases

arxiv: 1905.13100 · arxiv_version: 1905.13100v2 · doi: 10.48550/arxiv.1905.13100 · pith_short_12: 2RXP3GUTPBFV · pith_short_16: 2RXP3GUTPBFVMBAQ · pith_short_8: 2RXP3GUT

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/2RXP3GUTPBFVMBAQBCJ3LIIYCM \
  | 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: d46efd9a93784b5604100893b5a118133d5db9014010fcdb3eee2a053539c87b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "566defb3ec0121eb98c0f0f01557be1c607ea1ad7edc29d6a40300d154412354",
    "cross_cats_sorted": [
      "cs.AI",
      "cs.LG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LO",
    "submitted_at": "2019-05-30T15:23:26Z",
    "title_canon_sha256": "64a2cb6d942324ee6e0c36ec10186bffbbfea2316892238feda22f9d2c68651a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1905.13100",
    "kind": "arxiv",
    "version": 2
  }
}