Pith Number

pith:UNEX4OC6

pith:2019:UNEX4OC6APQFK2NA652DAN2O6T

not attested not anchored not stored refs pending

An Empirical Study of Obsolete Answers on Stack Overflow

Ahmed E. Hassan, Haoxiang Zhang, Shaowei Wang, Tse-Hsun (Peter) Chen, Ying Zou

arxiv:1903.12282 v1 · 2019-03-28 · 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{UNEX4OC6APQFK2NA652DAN2O6T}

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	2026-05-17T23:49:54.418281Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a3497e385e03e05569a0f77430374ef4cff55d8e230524587e68d38cd1818822

Aliases

arxiv: 1903.12282 · arxiv_version: 1903.12282v1 · doi: 10.48550/arxiv.1903.12282 · pith_short_12: UNEX4OC6APQF · pith_short_16: UNEX4OC6APQFK2NA · pith_short_8: UNEX4OC6

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/UNEX4OC6APQFK2NA652DAN2O6T \
  | 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: a3497e385e03e05569a0f77430374ef4cff55d8e230524587e68d38cd1818822

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "80e469ad5e124e202714266d4aa1c6b47afec59959a91711ee3c62035600a175",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by-sa/4.0/",
    "primary_cat": "cs.SE",
    "submitted_at": "2019-03-28T21:40:11Z",
    "title_canon_sha256": "ecfc22924df7bae417e6a48e1c7ff1e9ba77663ecae7f314918c0cecff0b3caa"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1903.12282",
    "kind": "arxiv",
    "version": 1
  }
}