Pith Number

pith:MZ4CCWM7

pith:2009:MZ4CCWM7S4LJPPPNGOVKYS56OX

not attested not anchored not stored refs pending

Lexical evolution rates by automated stability measure

Filippo Petroni, Maurizio Serva

arxiv:0912.0821 v2 · 2009-12-04 · cs.CL · physics.soc-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{MZ4CCWM7S4LJPPPNGOVKYS56OX}

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	2026-05-18T02:10:26.562967Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

667821599f971697bded33aaac4bbe75f73f2a56800158ff95925a5277485bcb

Aliases

arxiv: 0912.0821 · arxiv_version: 0912.0821v2 · doi: 10.48550/arxiv.0912.0821 · pith_short_12: MZ4CCWM7S4LJ · pith_short_16: MZ4CCWM7S4LJPPPN · pith_short_8: MZ4CCWM7

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/MZ4CCWM7S4LJPPPNGOVKYS56OX \
  | 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: 667821599f971697bded33aaac4bbe75f73f2a56800158ff95925a5277485bcb

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "db79010053acde2ff3835e9ea055706684f50b1105f2c6b3632433933e516fe2",
    "cross_cats_sorted": [
      "physics.soc-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CL",
    "submitted_at": "2009-12-04T11:33:54Z",
    "title_canon_sha256": "1e054fa811e0585ef23aadbcfa24bafe58b455b7b7d106bf04b403b81a6b5cb6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0912.0821",
    "kind": "arxiv",
    "version": 2
  }
}