Pith Number

pith:PPJ6ISRL

pith:2013:PPJ6ISRLLCFLTVTMQV7VETOVFK

not attested not anchored not stored refs pending

Schwarzschild-like metric and a quantum vacuum

P. R. Silva

arxiv:1302.1491 v1 · 2013-02-01 · physics.gen-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{PPJ6ISRLLCFLTVTMQV7VETOVFK}

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	2026-05-18T03:34:24.117917Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7bd3e44a2b588ab9d66c857f524dd52a9835e86e7e81f003e35f60e9d607718f

Aliases

arxiv: 1302.1491 · arxiv_version: 1302.1491v1 · doi: 10.48550/arxiv.1302.1491 · pith_short_12: PPJ6ISRLLCFL · pith_short_16: PPJ6ISRLLCFLTVTM · pith_short_8: PPJ6ISRL

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/PPJ6ISRLLCFLTVTMQV7VETOVFK \
  | 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: 7bd3e44a2b588ab9d66c857f524dd52a9835e86e7e81f003e35f60e9d607718f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5ce8b27baa6de62249df75e18e8a2690f2946df26da202a7dc79f425a9adc2c2",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.gen-ph",
    "submitted_at": "2013-02-01T19:15:35Z",
    "title_canon_sha256": "8d8f5e2ab375f4682751253c546125f8d0935d98fbaf385e9ae8008412725779"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1302.1491",
    "kind": "arxiv",
    "version": 1
  }
}