Pith Number

pith:PQFZ4WY3

pith:2015:PQFZ4WY3OKJMCZQYKPAMX4PZIM

not attested not anchored not stored refs pending

Clone and graft: Testing scientific applications as they are built

Bruno Turcksin, Timo Heister, Wolfgang Bangerth

arxiv:1508.07231 v1 · 2015-08-28 · cs.MS

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{PQFZ4WY3OKJMCZQYKPAMX4PZIM}

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	2026-05-18T01:34:36.538700Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7c0b9e5b1b7292c1661853c0cbf1f943173fe0a93a56d8b487d11ae487105162

Aliases

arxiv: 1508.07231 · arxiv_version: 1508.07231v1 · doi: 10.48550/arxiv.1508.07231 · pith_short_12: PQFZ4WY3OKJM · pith_short_16: PQFZ4WY3OKJMCZQY · pith_short_8: PQFZ4WY3

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/PQFZ4WY3OKJMCZQYKPAMX4PZIM \
  | 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: 7c0b9e5b1b7292c1661853c0cbf1f943173fe0a93a56d8b487d11ae487105162

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0b884d793de6755183fb5cc90b2f27b40404332726caf24cb49a1d0d4fa089a5",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.MS",
    "submitted_at": "2015-08-28T14:42:09Z",
    "title_canon_sha256": "b661e37961033daf2ee3eac796a88b1a5a2b91c33c9b0ba8ed00b14305c1ab49"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1508.07231",
    "kind": "arxiv",
    "version": 1
  }
}