Pith Number

pith:UW4P7ABA

pith:2020:UW4P7ABAI3Y4GA5N45CELC6SEZ

not attested not anchored not stored refs pending

What do class comments tell us? An investigation of comment evolution and practices in Pharo Smalltalk

Manuel Leuenberger, Mohammad Ghafari, Oscar Nierstrasz, Pooja Rani, Sebastiano Panichella

arxiv:2005.11583 v3 · 2020-05-23 · 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{UW4P7ABAI3Y4GA5N45CELC6SEZ}

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	2026-07-05T03:06:57.313451Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a5b8ff802046f1c303ade744458bd2265ecbdf8f6840582c0e83830c188b2c71

Aliases

arxiv: 2005.11583 · arxiv_version: 2005.11583v3 · doi: 10.48550/arxiv.2005.11583 · pith_short_12: UW4P7ABAI3Y4 · pith_short_16: UW4P7ABAI3Y4GA5N · pith_short_8: UW4P7ABA

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/UW4P7ABAI3Y4GA5N45CELC6SEZ \
  | 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: a5b8ff802046f1c303ade744458bd2265ecbdf8f6840582c0e83830c188b2c71

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e75ad2f7c906d956977ce1cfe853af44107d5b1d8032eb793b806889154241a5",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.SE",
    "submitted_at": "2020-05-23T18:46:44Z",
    "title_canon_sha256": "580ff51b564b9bdc7f3954012b5db6e773bfe5ddc92ae0862a671c7562a5cf6e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2005.11583",
    "kind": "arxiv",
    "version": 3
  }
}