Pith Number

pith:XPN6B55L

pith:2013:XPN6B55LAIIFWK42E65WYYIMOL

not attested not anchored not stored refs pending

A systematic empirical comparison of different approaches for normalizing citation impact indicators

Ludo Waltman, Nees Jan van Eck

arxiv:1301.4941 v2 · 2013-01-21 · cs.DL

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{XPN6B55LAIIFWK42E65WYYIMOL}

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	2026-05-18T03:29:15.597436Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

bbdbe0f7ab02105b2b9a27bb6c610c72cd3339b4b13de82f2d94813bd00bac48

Aliases

arxiv: 1301.4941 · arxiv_version: 1301.4941v2 · doi: 10.48550/arxiv.1301.4941 · pith_short_12: XPN6B55LAIIF · pith_short_16: XPN6B55LAIIFWK42 · pith_short_8: XPN6B55L

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/XPN6B55LAIIFWK42E65WYYIMOL \
  | 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: bbdbe0f7ab02105b2b9a27bb6c610c72cd3339b4b13de82f2d94813bd00bac48

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "904e1c97896ec73665ac89909963ed15e48f4e063364025c8b9eb8e24471e503",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DL",
    "submitted_at": "2013-01-21T18:04:31Z",
    "title_canon_sha256": "e325a9bb10251f15767610aabb1f7145a26f6416958b6db042e1baad6d960e5a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1301.4941",
    "kind": "arxiv",
    "version": 2
  }
}