Pith Number

pith:E7SITOIJ

pith:2009:E7SITOIJXS3IL2G4VRJW7B3RLU

not attested not anchored not stored refs pending

Varying fine structure "constant" and charged black holes

Jacob D. Bekenstein, Marcelo Schiffer

arxiv:0906.4557 v2 · 2009-06-24 · gr-qc · astro-ph.CO · hep-th

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{E7SITOIJXS3IL2G4VRJW7B3RLU}

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	2026-05-18T03:08:04.625660Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

27e489b909bcb685e8dcac536f87715d1dcedc3226d9d224a60a17f49a0e2adf

Aliases

arxiv: 0906.4557 · arxiv_version: 0906.4557v2 · doi: 10.48550/arxiv.0906.4557 · pith_short_12: E7SITOIJXS3I · pith_short_16: E7SITOIJXS3IL2G4 · pith_short_8: E7SITOIJ

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/E7SITOIJXS3IL2G4VRJW7B3RLU \
  | 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: 27e489b909bcb685e8dcac536f87715d1dcedc3226d9d224a60a17f49a0e2adf

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "91eb11dc5135495606066390ffb535685d9eee17ae6928aeb15f4fd577ba8e86",
    "cross_cats_sorted": [
      "astro-ph.CO",
      "hep-th"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2009-06-24T20:00:23Z",
    "title_canon_sha256": "1855ec234b910327fe5611a492e1edf2d8f42b7ac902294cdc1ec0b19c71f214"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0906.4557",
    "kind": "arxiv",
    "version": 2
  }
}