Pith Number

pith:VWI4BMTI

pith:2019:VWI4BMTIQVZWKQMFPTBRVQJHXV

not attested not anchored not stored refs pending

Lifelong learning for text retrieval and recognition in historical handwritten document collections

Lambert Schomaker

arxiv:1912.05156 v1 · 2019-12-11 · cs.CV · cs.CL · 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{VWI4BMTIQVZWKQMFPTBRVQJHXV}

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	2026-07-05T00:25:32.831155Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ad91c0b26885736541857cc31ac127bd5ba6558467c5036ee7d089af3e7680ba

Aliases

arxiv: 1912.05156 · arxiv_version: 1912.05156v1 · doi: 10.48550/arxiv.1912.05156 · pith_short_12: VWI4BMTIQVZW · pith_short_16: VWI4BMTIQVZWKQMF · pith_short_8: VWI4BMTI

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/VWI4BMTIQVZWKQMFPTBRVQJHXV \
  | 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: ad91c0b26885736541857cc31ac127bd5ba6558467c5036ee7d089af3e7680ba

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "92f7647ae5467c33679dc6cd8c3115777e98898caf341732c594d2affb0de980",
    "cross_cats_sorted": [
      "cs.CL",
      "cs.LG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2019-12-11T07:56:31Z",
    "title_canon_sha256": "cd3442ab0216e89dd6b759d30f6d1aafdb651ec37d48c630c9835e7957ba17be"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1912.05156",
    "kind": "arxiv",
    "version": 1
  }
}