Pith Number

pith:U54RBVCZ

pith:2013:U54RBVCZPG47VTZQ34IRM7HVKK

not attested not anchored not stored refs pending

Understanding ACT-R - an Outsider's Perspective

Jacob Whitehill

arxiv:1306.0125 v1 · 2013-06-01 · cs.LG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{U54RBVCZPG47VTZQ34IRM7HVKK}

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	2026-05-18T03:21:56.064019Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a77910d45979b9facf30df11167cf552a97c887179ce33088defd3ac23c77850

Aliases

arxiv: 1306.0125 · arxiv_version: 1306.0125v1 · doi: 10.48550/arxiv.1306.0125 · pith_short_12: U54RBVCZPG47 · pith_short_16: U54RBVCZPG47VTZQ · pith_short_8: U54RBVCZ

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/U54RBVCZPG47VTZQ34IRM7HVKK \
  | 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: a77910d45979b9facf30df11167cf552a97c887179ce33088defd3ac23c77850

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0d902270c6035ce178204d679d9c6bde9bef97bf1b8c6192f493f0a8dc420a9e",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2013-06-01T15:48:58Z",
    "title_canon_sha256": "524ea6c3723bbbf42dfb990bd760bf506cabec7f15fe573a91679fa253d0e6b0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1306.0125",
    "kind": "arxiv",
    "version": 1
  }
}