Pith Number

pith:DFESQC33

pith:2009:DFESQC33JIM5A4UR2MHFWYSC6L

not attested not anchored not stored refs pending

Projective geometry from Poisson algebras

Francesca Aicardi

arxiv:0912.1495 v2 · 2009-12-08 · math.MG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{DFESQC33JIM5A4UR2MHFWYSC6L}

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	2026-05-18T04:33:49.849333Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1949280b7b4a19d07291d30e5b6242f2daec06f16402f2f0831208ef6369ad30

Aliases

arxiv: 0912.1495 · arxiv_version: 0912.1495v2 · doi: 10.48550/arxiv.0912.1495 · pith_short_12: DFESQC33JIM5 · pith_short_16: DFESQC33JIM5A4UR · pith_short_8: DFESQC33

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/DFESQC33JIM5A4UR2MHFWYSC6L \
  | 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: 1949280b7b4a19d07291d30e5b6242f2daec06f16402f2f0831208ef6369ad30

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7c519c8e4293ac10e8098fd1384279bd70671dadfafd684965ba5cf064671b86",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.MG",
    "submitted_at": "2009-12-08T13:35:59Z",
    "title_canon_sha256": "79c2dc44b4eec1725b498ee205ded9832dceb1d64911d80e0b0d3f31b1f50f89"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0912.1495",
    "kind": "arxiv",
    "version": 2
  }
}