Pith Number

pith:RG2JXIIB

pith:2012:RG2JXIIBBRA5O4OMRKQQZLJF34

not attested not anchored not stored refs pending

Extended Forward-Backward Algorithm

Ludovic Nagesseur, Marc Lassonde

arxiv:1212.0523 v2 · 2012-12-03 · math.OC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{RG2JXIIBBRA5O4OMRKQQZLJF34}

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	2026-05-18T03:20:09.448213Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

89b49ba1010c41d771cc8aa10cad25df23200e19af2e581d5965afbca1668abd

Aliases

arxiv: 1212.0523 · arxiv_version: 1212.0523v2 · doi: 10.48550/arxiv.1212.0523 · pith_short_12: RG2JXIIBBRA5 · pith_short_16: RG2JXIIBBRA5O4OM · pith_short_8: RG2JXIIB

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/RG2JXIIBBRA5O4OMRKQQZLJF34 \
  | 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: 89b49ba1010c41d771cc8aa10cad25df23200e19af2e581d5965afbca1668abd

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "37e7518da303b5ba141d1421bb9987058171572a243c495cf6f2f52a1aba8d2f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2012-12-03T20:23:00Z",
    "title_canon_sha256": "14d28f041323a51b86a4d192ca5652ef5cf62fb058ce5997b0b06ed5387702af"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1212.0523",
    "kind": "arxiv",
    "version": 2
  }
}