Pith Number

pith:QMGNW4J4

pith:2012:QMGNW4J4OGK54BYIUQECPLYI5N

not attested not anchored not stored refs pending

Mathematicians take a stand

Douglas N. Arnold, Henry Cohn

arxiv:1204.1351 v2 · 2012-04-05 · math.HO · cs.GL

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QMGNW4J4OGK54BYIUQECPLYI5N}

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	2026-05-18T03:00:59.301733Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

830cdb713c7195de0708a40827af08eb69f741c25eeb06e23471335e1809c4df

Aliases

arxiv: 1204.1351 · arxiv_version: 1204.1351v2 · doi: 10.48550/arxiv.1204.1351 · pith_short_12: QMGNW4J4OGK5 · pith_short_16: QMGNW4J4OGK54BYI · pith_short_8: QMGNW4J4

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/QMGNW4J4OGK54BYIUQECPLYI5N \
  | 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: 830cdb713c7195de0708a40827af08eb69f741c25eeb06e23471335e1809c4df

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "af2d6bd179450dbc2924fcd9774d24761f37e958085a894b90a8a8744d267f03",
    "cross_cats_sorted": [
      "cs.GL"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.HO",
    "submitted_at": "2012-04-05T20:06:16Z",
    "title_canon_sha256": "af2f52c2e5f721e399540315ffde3cde6973664d97b420577363620d00678139"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1204.1351",
    "kind": "arxiv",
    "version": 2
  }
}