Pith Number

pith:7DL3SYSH

pith:2014:7DL3SYSHBWHM6O4BLBT3X2S3YC

not attested not anchored not stored refs pending

Universal coordinates for Schwarzschild black holes

W G Unruh

arxiv:1401.3393 v1 · 2014-01-15 · 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{7DL3SYSHBWHM6O4BLBT3X2S3YC}

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	2026-05-18T03:02:09.408667Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f8d7b962470d8ecf3b815867bbea5bc08a5a59ebcbeecee24dc24d63f58d0ff8

Aliases

arxiv: 1401.3393 · arxiv_version: 1401.3393v1 · doi: 10.48550/arxiv.1401.3393 · pith_short_12: 7DL3SYSHBWHM · pith_short_16: 7DL3SYSHBWHM6O4B · pith_short_8: 7DL3SYSH

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/7DL3SYSHBWHM6O4BLBT3X2S3YC \
  | 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: f8d7b962470d8ecf3b815867bbea5bc08a5a59ebcbeecee24dc24d63f58d0ff8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c6ce92e2ae895f8708f993bd3c3ee63c9f36fe6a2bb18f264b65b2ac70886800",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2014-01-15T00:11:34Z",
    "title_canon_sha256": "e2390df8722c04f4e7eff0627280273f71b60d9014595589382d9c37cd00b4c7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1401.3393",
    "kind": "arxiv",
    "version": 1
  }
}