Pith Number

pith:JUNFALVT

pith:2024:JUNFALVT4KD6M4WQCRDH2B7VOM

not attested not anchored not stored refs pending

Constraints on the black-hole charges of M87* and Sagittarius A* by changing rates of photon spheres can be relaxed

Naoki Tsukamoto, Ryotaro Kase

arxiv:2404.06414 v3 · 2024-04-09 · 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{JUNFALVT4KD6M4WQCRDH2B7VOM}

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.

Cited by

1 paper in Pith

Determining parameters of Kerr-Newman black holes by shadow observation from finite distance and spatial infinity

Receipt and verification

First computed	2026-07-05T09:01:32.343009Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4d1a502eb3e287e672d014467d07f573347b00486a69955f03c0d8ac782be08f

Aliases

arxiv: 2404.06414 · arxiv_version: 2404.06414v3 · doi: 10.48550/arxiv.2404.06414 · pith_short_12: JUNFALVT4KD6 · pith_short_16: JUNFALVT4KD6M4WQ · pith_short_8: JUNFALVT

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/JUNFALVT4KD6M4WQCRDH2B7VOM \
  | 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: 4d1a502eb3e287e672d014467d07f573347b00486a69955f03c0d8ac782be08f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cd81aded5ab8cc0f5fcb10dee00cc9d6e6929b22186a333e0a6843556017c29c",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2024-04-09T16:03:42Z",
    "title_canon_sha256": "c3c825f10f020ffbb4ed6bdd8a558ad6bc131b6054093ba2dece2e3c4f5024cc"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2404.06414",
    "kind": "arxiv",
    "version": 3
  }
}