Pith Number

pith:CTVDCR5O

pith:2009:CTVDCR5OCUD7QWLR4JKAZYB3BH

not attested not anchored not stored refs pending

On the optical-mechanical analogy in general relativity

Anwarul Islam, Kamal K. Nandi

arxiv:0905.4479 v1 · 2009-05-27 · 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{CTVDCR5OCUD7QWLR4JKAZYB3BH}

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	2026-05-18T02:13:31.511813Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

14ea3147ae1507f85971e2540ce03b09f2cde22897da723e98be58401a324232

Aliases

arxiv: 0905.4479 · arxiv_version: 0905.4479v1 · doi: 10.48550/arxiv.0905.4479 · pith_short_12: CTVDCR5OCUD7 · pith_short_16: CTVDCR5OCUD7QWLR · pith_short_8: CTVDCR5O

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/CTVDCR5OCUD7QWLR4JKAZYB3BH \
  | 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: 14ea3147ae1507f85971e2540ce03b09f2cde22897da723e98be58401a324232

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "61ea937ad78b518c3644aa484be4ef3bcad8e0c45b1a7d26fd21121e9ee05f78",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2009-05-27T17:42:29Z",
    "title_canon_sha256": "850ae540e0252fb1bf6a5e6ac0fbd955a5799c3cd1c1f5a4bfd0b83333f7b536"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0905.4479",
    "kind": "arxiv",
    "version": 1
  }
}