Pith Number

pith:QHS7WQ5Z

pith:2013:QHS7WQ5ZQ27R7SHPXWWEQEGV5P

not attested not anchored not stored refs pending

The Rooster and the Syntactic Bracket

Arnaud Spiwack, Hugo Herbelin

arxiv:1309.5767 v2 · 2013-09-23 · cs.LO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QHS7WQ5ZQ27R7SHPXWWEQEGV5P}

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	2026-05-18T02:49:47.157473Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

81e5fb43b986bf1fc8efbdac4810d5ebe0ae36724c978784bad603384b2faddd

Aliases

arxiv: 1309.5767 · arxiv_version: 1309.5767v2 · doi: 10.48550/arxiv.1309.5767 · pith_short_12: QHS7WQ5ZQ27R · pith_short_16: QHS7WQ5ZQ27R7SHP · pith_short_8: QHS7WQ5Z

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/QHS7WQ5ZQ27R7SHPXWWEQEGV5P \
  | 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: 81e5fb43b986bf1fc8efbdac4810d5ebe0ae36724c978784bad603384b2faddd

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d1a9e677066abe3d9906be25673193151cd0734709b0f627a455b32625f6d6e6",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/3.0/",
    "primary_cat": "cs.LO",
    "submitted_at": "2013-09-23T11:14:12Z",
    "title_canon_sha256": "faa9a86d7c4af6d1ca7d9fb30359a29dae54a4cda89eb57df2d89ed6adc38733"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1309.5767",
    "kind": "arxiv",
    "version": 2
  }
}