Pith Number

pith:ZEPHLZC7

pith:2012:ZEPHLZC7CIGDTKD5DC577WXMYY

not attested not anchored not stored refs pending

An empirical approach to interpreting card-sorting data

Daniel P. Dougherty, Gerd Kortemeyer, Steven F. Wolf

arxiv:1201.6601 v1 · 2012-01-31 · physics.ed-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{ZEPHLZC7CIGDTKD5DC577WXMYY}

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	2026-05-18T03:51:36.569483Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c91e75e45f120c39a87d18bbffdaecc6148db2711bae5a21840caad3df10ff94

Aliases

arxiv: 1201.6601 · arxiv_version: 1201.6601v1 · doi: 10.48550/arxiv.1201.6601 · pith_short_12: ZEPHLZC7CIGD · pith_short_16: ZEPHLZC7CIGDTKD5 · pith_short_8: ZEPHLZC7

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/ZEPHLZC7CIGDTKD5DC577WXMYY \
  | 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: c91e75e45f120c39a87d18bbffdaecc6148db2711bae5a21840caad3df10ff94

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "82cb8ad2f0bbb820fc01f474ed7a6510925deceec6fb6c9c1aa37c795532f844",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.ed-ph",
    "submitted_at": "2012-01-31T16:32:36Z",
    "title_canon_sha256": "928d81423230e31abb9fff2d30dcd13350a771307e820715cffc93805398123e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1201.6601",
    "kind": "arxiv",
    "version": 1
  }
}