Pith Number

pith:UTNJY7WK

pith:2013:UTNJY7WKWXNHXY5MKHYIR5VG46

not attested not anchored not stored refs pending

Possible Directions for Improving Dependency Versioning in R

Jeroen Ooms

arxiv:1303.2140 v2 · 2013-03-08 · cs.SE · cs.MS · stat.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{UTNJY7WKWXNHXY5MKHYIR5VG46}

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	2026-05-18T03:08:15.951215Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a4da9c7ecab5da7be3ac51f088f6a6e7900cc2b2b00f5f5126c14d5b29a5619f

Aliases

arxiv: 1303.2140 · arxiv_version: 1303.2140v2 · doi: 10.48550/arxiv.1303.2140 · pith_short_12: UTNJY7WKWXNH · pith_short_16: UTNJY7WKWXNHXY5M · pith_short_8: UTNJY7WK

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/UTNJY7WKWXNHXY5MKHYIR5VG46 \
  | 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: a4da9c7ecab5da7be3ac51f088f6a6e7900cc2b2b00f5f5126c14d5b29a5619f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5a98038091804c36beef70de43155a6d41ab389c717be455381961c1c5150be0",
    "cross_cats_sorted": [
      "cs.MS",
      "stat.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.SE",
    "submitted_at": "2013-03-08T22:32:22Z",
    "title_canon_sha256": "8d6550c29364c76f11b44c2cea40677c503bf70bf57d23f22ff93ff9a9ab035b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1303.2140",
    "kind": "arxiv",
    "version": 2
  }
}