Pith Number

pith:7EDDZPCS

pith:1998:7EDDZPCSNL5JBJANEP2RPFNREH

not attested not anchored not stored refs pending

Black holes, brick walls and the Boulware state

Shinji Mukohyama, Werner Israel

arxiv:gr-qc/9806012 v2 · 1998-06-03 · gr-qc · 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{7EDDZPCSNL5JBJANEP2RPFNREH}

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	2026-05-18T01:08:07.644042Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f9063cbc526afa90a40d23f51795b121e5dce44d890367ea561a4fda8676e7cb

Aliases

arxiv: gr-qc/9806012 · arxiv_version: gr-qc/9806012v2 · doi: 10.48550/arxiv.gr-qc/9806012 · pith_short_12: 7EDDZPCSNL5J · pith_short_16: 7EDDZPCSNL5JBJAN · pith_short_8: 7EDDZPCS

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/7EDDZPCSNL5JBJANEP2RPFNREH \
  | 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: f9063cbc526afa90a40d23f51795b121e5dce44d890367ea561a4fda8676e7cb

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d250b456e43e96209e4728f66fcfd59c94f29c4a721061209134180aee49ea7d",
    "cross_cats_sorted": [
      "hep-th"
    ],
    "license": "",
    "primary_cat": "gr-qc",
    "submitted_at": "1998-06-03T11:56:33Z",
    "title_canon_sha256": "8d6b58261c681cf15be41d4515cd4247de8c8228c15b2b8bd2d46a191a715a67"
  },
  "schema_version": "1.0",
  "source": {
    "id": "gr-qc/9806012",
    "kind": "arxiv",
    "version": 2
  }
}