Pith Number

pith:IRPYS5VY

pith:2013:IRPYS5VYCGU6YP47ONJ3KFRPH5

not attested not anchored not stored refs pending

Modularity Index Metrics for Java-Based Open Source Software Projects

Andi Wahju Rahardjo Emanuel, Jazi Eko Istiyanto, Khabib Mustofa, Retantyo Wardoyo

arxiv:1309.5689 v1 · 2013-09-23 · 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{IRPYS5VYCGU6YP47ONJ3KFRPH5}

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	2026-05-18T03:12:34.467664Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

445f8976b811a9ec3f9f7353b5162f3f5570c19305b0a3573acd462bf2533a88

Aliases

arxiv: 1309.5689 · arxiv_version: 1309.5689v1 · doi: 10.48550/arxiv.1309.5689 · pith_short_12: IRPYS5VYCGU6 · pith_short_16: IRPYS5VYCGU6YP47 · pith_short_8: IRPYS5VY

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/IRPYS5VYCGU6YP47ONJ3KFRPH5 \
  | 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: 445f8976b811a9ec3f9f7353b5162f3f5570c19305b0a3573acd462bf2533a88

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5d666867eeded90640077cf5cacc7dc68ea17ea93ce6b33c3600d24e1c2292ea",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.SE",
    "submitted_at": "2013-09-23T03:28:07Z",
    "title_canon_sha256": "1d3b8f1f35a80f6083643214cb8b5cf372a3d792ea89473e039181608af5a9f3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1309.5689",
    "kind": "arxiv",
    "version": 1
  }
}