Pith Number

pith:6A2G6M7G

pith:2012:6A2G6M7GRHFYVTAHJDFP75UWX7

not attested not anchored not stored refs pending

From Fields to Trees

Firas Hamze, Nando de Freitas

arxiv:1207.4149 v1 · 2012-07-11 · stat.CO · cs.LG

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

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	2026-05-18T03:50:47.646379Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f0346f33e689cb8acc0748cafff696bfe7073d9c25a570a2e26be059dd55d6f4

Aliases

arxiv: 1207.4149 · arxiv_version: 1207.4149v1 · doi: 10.48550/arxiv.1207.4149 · pith_short_12: 6A2G6M7GRHFY · pith_short_16: 6A2G6M7GRHFYVTAH · pith_short_8: 6A2G6M7G

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/6A2G6M7GRHFYVTAHJDFP75UWX7 \
  | 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: f0346f33e689cb8acc0748cafff696bfe7073d9c25a570a2e26be059dd55d6f4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "85d24e276ac6c360ddca9f1d0605ccf6045ed3cd7c9e6f0203be48c18afca128",
    "cross_cats_sorted": [
      "cs.LG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "stat.CO",
    "submitted_at": "2012-07-11T14:56:43Z",
    "title_canon_sha256": "e5c0c921829522177579a37041ff75552d621bbf66cbab8c802359920ed9c794"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1207.4149",
    "kind": "arxiv",
    "version": 1
  }
}