Pith Number

pith:ZE2K5XDC

pith:2009:ZE2K5XDCDM7LV7VYVCLOFSZOKZ

not attested not anchored not stored refs pending

Revisiting the semiclassical gravity scenario for gravitational collapse

C. Barcelo, M. Visser, S. Liberati, S. Sonego

arxiv:0909.4157 v1 · 2009-09-23 · 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{ZE2K5XDCDM7LV7VYVCLOFSZOKZ}

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	2026-05-18T02:11:44.992526Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c934aedc621b3ebafeb8a896e2cb2e566a70611679443fe1724ee4e91c67043b

Aliases

arxiv: 0909.4157 · arxiv_version: 0909.4157v1 · doi: 10.48550/arxiv.0909.4157 · pith_short_12: ZE2K5XDCDM7L · pith_short_16: ZE2K5XDCDM7LV7VY · pith_short_8: ZE2K5XDC

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/ZE2K5XDCDM7LV7VYVCLOFSZOKZ \
  | 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: c934aedc621b3ebafeb8a896e2cb2e566a70611679443fe1724ee4e91c67043b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "303c6fc88bf9f90693e1ec61eedd954393b86d5464834ede635e5f6e9addedb4",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2009-09-23T09:28:28Z",
    "title_canon_sha256": "8e5f55c1fd28d47d92caa69766734346bde99adb5da5add2ae4b7af0e204e67d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0909.4157",
    "kind": "arxiv",
    "version": 1
  }
}