Pith Number

pith:SQFLEQF2

pith:2017:SQFLEQF2TBHXZFDWA2BL7G264V

not attested not anchored not stored refs pending

Fundamental photon orbits: black hole shadows and spacetime instabilities

Carlos A.R. Herdeiro, Eugen Radu, Pedro V.P. Cunha

arxiv:1705.05461 v1 · 2017-05-15 · 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{SQFLEQF2TBHXZFDWA2BL7G264V}

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

2 papers in Pith

On the Cuspy Structure of Rotating Wormhole Shadows

Gravity/thermodynamics correspondence via black hole shadows

Receipt and verification

First computed	2026-05-18T00:38:52.600355Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

940ab240ba984f7c94760682bf9b5ee57aa7fa73fcbe1cccf38d20a21e20c141

Aliases

arxiv: 1705.05461 · arxiv_version: 1705.05461v1 · doi: 10.48550/arxiv.1705.05461 · pith_short_12: SQFLEQF2TBHX · pith_short_16: SQFLEQF2TBHXZFDW · pith_short_8: SQFLEQF2

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/SQFLEQF2TBHXZFDWA2BL7G264V \
  | 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: 940ab240ba984f7c94760682bf9b5ee57aa7fa73fcbe1cccf38d20a21e20c141

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d01eb9141677f5a35e9ead5f0eeb60f07ae14f31c68528d56e1f22abb849b1b9",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2017-05-15T21:47:26Z",
    "title_canon_sha256": "8a1363e31de8d1866bfae57eefdfb86af69883d90fe25523edc8d8d4157424d0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1705.05461",
    "kind": "arxiv",
    "version": 1
  }
}