Pith Number

pith:4REMJGNW

pith:2020:4REMJGNWRIGDGF3SLDXJ7YY4VD

not attested not anchored not stored refs pending

Black holes and naked singularities from Anton-Schmidt's fluids

Daniele Gregoris, Rocco D'Agostino, Salvatore Capozziello

arxiv:2002.04875 v1 · 2020-02-12 · gr-qc · astro-ph.HE · 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{4REMJGNWRIGDGF3SLDXJ7YY4VD}

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	2026-07-05T00:40:19.364293Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e448c499b68a0c33177258ee9fe31ca8de73e34b0911c64320b9a7e2401d175d

Aliases

arxiv: 2002.04875 · arxiv_version: 2002.04875v1 · doi: 10.48550/arxiv.2002.04875 · pith_short_12: 4REMJGNWRIGD · pith_short_16: 4REMJGNWRIGDGF3S · pith_short_8: 4REMJGNW

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/4REMJGNWRIGDGF3SLDXJ7YY4VD \
  | 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: e448c499b68a0c33177258ee9fe31ca8de73e34b0911c64320b9a7e2401d175d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "854eedfdb0b7d35ec76f4f9e44e2258477a1898faadb7d3a94111524039f4774",
    "cross_cats_sorted": [
      "astro-ph.HE",
      "hep-th"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2020-02-12T09:51:06Z",
    "title_canon_sha256": "98e264d2d52ba35cfb3e62adb334a33effc5667bf61a8d2ed8f1ae3599506e85"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2002.04875",
    "kind": "arxiv",
    "version": 1
  }
}