Pith Number

pith:UZHFKU6N

pith:2017:UZHFKU6NFUFDVM6GWV2AEE2HXS

not attested not anchored not stored refs pending

The Fingerprints of Black Holes - Shadows and their Degeneracies

Claudio F. Paganini, Marc Mars, Marius A. Oancea

arxiv:1710.02402 v1 · 2017-10-06 · gr-qc · math-ph · math.MP

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{UZHFKU6NFUFDVM6GWV2AEE2HXS}

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	2026-07-05T09:26:52.829088Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a64e5553cd2d0a3ab3c6b574021347bc99d983b28352f7301b091ad9b162713c

Aliases

arxiv: 1710.02402 · arxiv_version: 1710.02402v1 · doi: 10.48550/arxiv.1710.02402 · pith_short_12: UZHFKU6NFUFD · pith_short_16: UZHFKU6NFUFDVM6G · pith_short_8: UZHFKU6N

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/UZHFKU6NFUFDVM6GWV2AEE2HXS \
  | 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: a64e5553cd2d0a3ab3c6b574021347bc99d983b28352f7301b091ad9b162713c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "802a64494939ec7e661378b180509674c6a425988571e86f0edf40ab2a144692",
    "cross_cats_sorted": [
      "math-ph",
      "math.MP"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2017-10-06T13:30:59Z",
    "title_canon_sha256": "b949c9e8961a48a3691ef49f734a3170e1ebf32c8ad2f6fde56f0595d2d8c638"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1710.02402",
    "kind": "arxiv",
    "version": 1
  }
}