Pith Number

pith:OQ4Q7M6Z

pith:2013:OQ4Q7M6Z2JIRSTYR5KDJEI3C45

not attested not anchored not stored refs pending

Characterizations of finite classical polar spaces by intersection numbers with hyperplanes and speces of codimension 2

Jeroen Schillewaert, Stefaan De Winter

arxiv:1309.2005 v1 · 2013-09-08 · 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{OQ4Q7M6Z2JIRSTYR5KDJEI3C45}

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	2026-05-18T03:13:56.797027Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

74390fb3d9d251194f11ea86922362e778ea0454a1a4a860694d375a6aed6489

Aliases

arxiv: 1309.2005 · arxiv_version: 1309.2005v1 · doi: 10.48550/arxiv.1309.2005 · pith_short_12: OQ4Q7M6Z2JIR · pith_short_16: OQ4Q7M6Z2JIRSTYR · pith_short_8: OQ4Q7M6Z

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/OQ4Q7M6Z2JIRSTYR5KDJEI3C45 \
  | 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: 74390fb3d9d251194f11ea86922362e778ea0454a1a4a860694d375a6aed6489

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b36acc5134721fe11ea1e706b652bde85ad419497379d4aca0d3af2ef6503399",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2013-09-08T20:24:28Z",
    "title_canon_sha256": "c6dfa0026ea53f5d8d426d3834c6ed34208a4fdb5b320d490883f0caf8b853df"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1309.2005",
    "kind": "arxiv",
    "version": 1
  }
}