Pith Number

pith:5L7LNIVE

pith:2009:5L7LNIVEZG6F72PWVGA22LQQQ2

not attested not anchored not stored refs pending

Pappus-Desargues digraph confrontation

Italo J. Dejter

arxiv:0904.1096 v25 · 2009-04-07 · math.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{5L7LNIVEZG6F72PWVGA22LQQQ2}

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	2026-05-18T03:53:42.722242Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

eafeb6a2a4c9bc5fe9f6a981ad2e108692a08f30da0bbae824cf62e0693953a9

Aliases

arxiv: 0904.1096 · arxiv_version: 0904.1096v25 · doi: 10.48550/arxiv.0904.1096 · pith_short_12: 5L7LNIVEZG6F · pith_short_16: 5L7LNIVEZG6F72PW · pith_short_8: 5L7LNIVE

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/5L7LNIVEZG6F72PWVGA22LQQQ2 \
  | 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: eafeb6a2a4c9bc5fe9f6a981ad2e108692a08f30da0bbae824cf62e0693953a9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "732f6038cbd55fb87302b40b2fc0f0a19da3744942eea95ba111c0c884e404a2",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2009-04-07T09:53:24Z",
    "title_canon_sha256": "8f514306e5b9b6888b03724b7ce82c3c83230aa420b39355ce55025ac45ba44d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0904.1096",
    "kind": "arxiv",
    "version": 25
  }
}