Pith Number

pith:JQWU264Z

pith:2008:JQWU264Z4BH4SSM6L7W36HEDK3

not attested not anchored not stored refs pending

A characterization of quaternionic projective space by the conformal-Killing equation

Liana David, Massimiliano Pontecorvo

arxiv:0804.3889 v1 · 2008-04-24 · math.DG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{JQWU264Z4BH4SSM6L7W36HEDK3}

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	2026-05-18T02:58:11.588141Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4c2d4d7b99e04fc9499e5fedbf1c8356f09bcc1eeb5928ef660c26c003c2097b

Aliases

arxiv: 0804.3889 · arxiv_version: 0804.3889v1 · doi: 10.48550/arxiv.0804.3889 · pith_short_12: JQWU264Z4BH4 · pith_short_16: JQWU264Z4BH4SSM6 · pith_short_8: JQWU264Z

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/JQWU264Z4BH4SSM6L7W36HEDK3 \
  | 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: 4c2d4d7b99e04fc9499e5fedbf1c8356f09bcc1eeb5928ef660c26c003c2097b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c3086f02edab2e96fb41c825b354926d8aecfa2c11f252ec1bf151cdffe46d24",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DG",
    "submitted_at": "2008-04-24T11:09:37Z",
    "title_canon_sha256": "5cb573c0d0f83238f395dd840251c2f5b1cca38bb7a18e1b18170d1b68689159"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0804.3889",
    "kind": "arxiv",
    "version": 1
  }
}