Pith Number

pith:ZQWTC243

pith:2015:ZQWTC2434U63QZZLL3BUOCSQ4B

not attested not anchored not stored refs pending

Projectively related metrics, Weyl nullity, and metric projectively invariant equations

A. Rod Gover, Vladimir S. Matveev

arxiv:1507.02375 v2 · 2015-07-09 · math.DG · gr-qc

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{ZQWTC2434U63QZZLL3BUOCSQ4B}

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	2026-05-18T00:29:39.757593Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cc2d316b9be53db8672b5ec3470a50e054678544999519e391e2260503fa60f7

Aliases

arxiv: 1507.02375 · arxiv_version: 1507.02375v2 · doi: 10.48550/arxiv.1507.02375 · pith_short_12: ZQWTC2434U63 · pith_short_16: ZQWTC2434U63QZZL · pith_short_8: ZQWTC243

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/ZQWTC2434U63QZZLL3BUOCSQ4B \
  | 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: cc2d316b9be53db8672b5ec3470a50e054678544999519e391e2260503fa60f7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7da881d36723f90fa964326d0a75cd8e6e4b9c943a126214958c31350ce26efb",
    "cross_cats_sorted": [
      "gr-qc"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DG",
    "submitted_at": "2015-07-09T04:52:31Z",
    "title_canon_sha256": "3ac60389296e2d1021194472195f3baf8903b5d703ba0c352639d6475adef522"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1507.02375",
    "kind": "arxiv",
    "version": 2
  }
}