Pith Number

pith:DAT443WH

pith:2011:DAT443WHYQBN6PYTSUM6Y7FPLZ

not attested not anchored not stored refs pending

Large-scale Complex IT Systems

Dave Cliff, Ian Sommerville, John McDermid, Justin Keen, Marta Kwiatkowska, Radu Calinescu, Richard Paige, Tim Kelly

arxiv:1109.3444 v1 · 2011-09-15 · cs.SE · cs.CY

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{DAT443WHYQBN6PYTSUM6Y7FPLZ}

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	2026-05-18T04:12:56.738392Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1827ce6ec7c402df3f139519ec7caf5e71123379cd801bbd0dff78cae39d6bbe

Aliases

arxiv: 1109.3444 · arxiv_version: 1109.3444v1 · doi: 10.48550/arxiv.1109.3444 · pith_short_12: DAT443WHYQBN · pith_short_16: DAT443WHYQBN6PYT · pith_short_8: DAT443WH

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/DAT443WHYQBN6PYTSUM6Y7FPLZ \
  | 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: 1827ce6ec7c402df3f139519ec7caf5e71123379cd801bbd0dff78cae39d6bbe

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a87069c274e01a09367f9e4717b02d4119284dc8e21a9fad402448d61f1a9eb1",
    "cross_cats_sorted": [
      "cs.CY"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.SE",
    "submitted_at": "2011-09-15T19:50:42Z",
    "title_canon_sha256": "8f0dd43ddd80752a245c12f20d23538021c103c36ee613eac8f5d7cf3b9c9d4c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1109.3444",
    "kind": "arxiv",
    "version": 1
  }
}