Pith Number

pith:5H2DRPQC

pith:2013:5H2DRPQCAWY4KHZMSWOVC4XS26

not attested not anchored not stored refs pending

Automatically Extracting Instances of Code Change Patterns with AST Analysis

Laurence Duchien (INRIA Lille - Nord Europe, LIFL), Martin Monperrus (INRIA Lille - Nord Europe), Matias Martinez (INRIA Lille - Nord Europe)

arxiv:1309.3730 v1 · 2013-09-15 · cs.SE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{5H2DRPQCAWY4KHZMSWOVC4XS26}

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	2026-05-18T00:11:29.161485Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e9f438be0205b1c51f2c959d5172f2d7b3906945bb041e7ebab6f504a226e2dd

Aliases

arxiv: 1309.3730 · arxiv_version: 1309.3730v1 · doi: 10.48550/arxiv.1309.3730 · pith_short_12: 5H2DRPQCAWY4 · pith_short_16: 5H2DRPQCAWY4KHZM · pith_short_8: 5H2DRPQC

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/5H2DRPQCAWY4KHZMSWOVC4XS26 \
  | 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: e9f438be0205b1c51f2c959d5172f2d7b3906945bb041e7ebab6f504a226e2dd

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c05d04e75f502dc80264e440c5556dc7635c2b1826a3b5846a298387bb4e77e7",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.SE",
    "submitted_at": "2013-09-15T05:52:17Z",
    "title_canon_sha256": "197bc498fc1b714ee79e2228c9c60b4b88add3902b71f5348f9d21ac804c4161"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1309.3730",
    "kind": "arxiv",
    "version": 1
  }
}