Pith Number

pith:PERPZHC4

pith:2017:PERPZHC43NDADUYVVSXCHUZ2KC

not attested not anchored not stored refs pending

An Algebraic Formalization of Forward and Forward-backward Algorithms

Ai Azuma, Masashi Shimbo, Yuji Matsumoto

arxiv:1702.06941 v1 · 2017-02-22 · 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{PERPZHC43NDADUYVVSXCHUZ2KC}

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	2026-05-18T00:50:10.081134Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7922fc9c5cdb4601d315acae23d33a50bbe4121499ba0afbff7dcc253c7dd4d6

Aliases

arxiv: 1702.06941 · arxiv_version: 1702.06941v1 · doi: 10.48550/arxiv.1702.06941 · pith_short_12: PERPZHC43NDA · pith_short_16: PERPZHC43NDADUYV · pith_short_8: PERPZHC4

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/PERPZHC43NDADUYVVSXCHUZ2KC \
  | 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: 7922fc9c5cdb4601d315acae23d33a50bbe4121499ba0afbff7dcc253c7dd4d6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "43f1ddbecb9269b82f505948e55c35d4aad592771131c88d4e2f61201e41e82e",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2017-02-22T18:56:44Z",
    "title_canon_sha256": "239c128982e44b5468dc375fd744df088c38a70e60413728559331c3212f36b9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1702.06941",
    "kind": "arxiv",
    "version": 1
  }
}