Pith Number

pith:QRRE7SYC

pith:2007:QRRE7SYCVO5GVNM4WALJ4IU4FO

not attested not anchored not stored refs pending

Removing Manually-Generated Boilerplate from Electronic Texts: Experiments with Project Gutenberg e-Books

Daniel Lemire, Owen Kaser

arxiv:0707.1913 v3 · 2007-07-13 · cs.DL · cs.CL

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QRRE7SYCVO5GVNM4WALJ4IU4FO}

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	2026-05-18T01:08:21.789290Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

84624fcb02abba6ab59cb0169e229c2b931e6f9de219675b213dd8b231559f51

Aliases

arxiv: 0707.1913 · arxiv_version: 0707.1913v3 · doi: 10.48550/arxiv.0707.1913 · pith_short_12: QRRE7SYCVO5G · pith_short_16: QRRE7SYCVO5GVNM4 · pith_short_8: QRRE7SYC

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/QRRE7SYCVO5GVNM4WALJ4IU4FO \
  | 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: 84624fcb02abba6ab59cb0169e229c2b931e6f9de219675b213dd8b231559f51

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e964f58358ed92e102201200eb631ce0739717d68071e7057b9802886c06cb54",
    "cross_cats_sorted": [
      "cs.CL"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DL",
    "submitted_at": "2007-07-13T02:30:10Z",
    "title_canon_sha256": "8f63fb00512e69659cc579cbeb0d68fc71e8c68841bf0d2bbf402063907b6dba"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0707.1913",
    "kind": "arxiv",
    "version": 3
  }
}