Pith Number

pith:YYWNOV43

pith:2009:YYWNOV43C6WKSO5MZADSPX2XUG

not attested not anchored not stored refs pending

More on the covariant retarded Green's function for the electromagnetic field in de Sitter spacetime

Atsushi Higuchi, Jack R. Nicholas, Yen Cheong Lee

arxiv:0907.4002 v2 · 2009-07-23 · 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{YYWNOV43C6WKSO5MZADSPX2XUG}

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	2026-05-18T02:34:38.478198Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c62cd7579b17aca93bacc80727df57a18e9ca172f690717d9ee25daf53e2a5e4

Aliases

arxiv: 0907.4002 · arxiv_version: 0907.4002v2 · doi: 10.48550/arxiv.0907.4002 · pith_short_12: YYWNOV43C6WK · pith_short_16: YYWNOV43C6WKSO5M · pith_short_8: YYWNOV43

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/YYWNOV43C6WKSO5MZADSPX2XUG \
  | 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: c62cd7579b17aca93bacc80727df57a18e9ca172f690717d9ee25daf53e2a5e4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "45b174283abade9daffbccd688090c43b74e78b475685b9f5bda161402054708",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2009-07-23T08:53:51Z",
    "title_canon_sha256": "6d713766fb586e4295e9f4415c73152c0619abd5af2c72b2fe4b69e8a18b9eb6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0907.4002",
    "kind": "arxiv",
    "version": 2
  }
}