Pith Number

pith:P5OERF3U

pith:2012:P5OERF3UY2L5QMIAHMK5EHKDQL

not attested not anchored not stored refs pending

Proceedings First Workshop on CTP Components for Educational Software

Finland), Pedro Quaresma (University of Coimbra, Portugal), Ralph-Johan Back ({\AA}bo Akademi University

arxiv:1202.4535 v1 · 2012-02-21 · cs.SY · cs.LO · cs.MS · cs.SC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{P5OERF3UY2L5QMIAHMK5EHKDQL}

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	2026-05-18T04:01:50.422024Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7f5c489774c697d831003b15d21d4382dc96fb220003cf3fc49a2aa67839f8fe

Aliases

arxiv: 1202.4535 · arxiv_version: 1202.4535v1 · doi: 10.48550/arxiv.1202.4535 · pith_short_12: P5OERF3UY2L5 · pith_short_16: P5OERF3UY2L5QMIA · pith_short_8: P5OERF3U

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/P5OERF3UY2L5QMIAHMK5EHKDQL \
  | 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: 7f5c489774c697d831003b15d21d4382dc96fb220003cf3fc49a2aa67839f8fe

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "88cfff6549a3224af534e28925467f7074d14c83001d177cdf4b432b3085db1b",
    "cross_cats_sorted": [
      "cs.LO",
      "cs.MS",
      "cs.SC"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.SY",
    "submitted_at": "2012-02-21T05:56:10Z",
    "title_canon_sha256": "cb60e87dbd25177d721977b46672c3bbe7a41bb999d3bb7f584fbe07f3075f27"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1202.4535",
    "kind": "arxiv",
    "version": 1
  }
}