Pith Number

pith:4XTJ2CLR

pith:2008:4XTJ2CLRHI2EXPUSUJHZEFKVMW

not attested not anchored not stored refs pending

Ultra-hard fluid and scalar field in the Kerr-Newman metric

E. Babichev, S. Chernov, V. Dokuchaev, Yu. Eroshenko

arxiv:0807.0449 v2 · 2008-07-02 · gr-qc · astro-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{4XTJ2CLRHI2EXPUSUJHZEFKVMW}

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	2026-07-04T15:34:10.390632Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e5e69d09713a344bbe92a24f92155565a94af52ad9ce3b401a099da4c77f15b0

Aliases

arxiv: 0807.0449 · arxiv_version: 0807.0449v2 · doi: 10.48550/arxiv.0807.0449 · pith_short_12: 4XTJ2CLRHI2E · pith_short_16: 4XTJ2CLRHI2EXPUS · pith_short_8: 4XTJ2CLR

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/4XTJ2CLRHI2EXPUSUJHZEFKVMW \
  | 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: e5e69d09713a344bbe92a24f92155565a94af52ad9ce3b401a099da4c77f15b0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "25544872af151ec29058331d4b79a2b0e5ab9c1ad9a5fc365f00792bafc28a74",
    "cross_cats_sorted": [
      "astro-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2008-07-02T20:43:23Z",
    "title_canon_sha256": "529ffa247b87a881266cbaeed6ab00d98171f08247dd78b2a7aca3521586d332"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0807.0449",
    "kind": "arxiv",
    "version": 2
  }
}