Pith Number

pith:6AI4UBBW

pith:2016:6AI4UBBWC5XMVHV3UNB7LEQCD2

not attested not anchored not stored refs pending

Lux in obscuro: Photon Orbits of Extremal Black Holes Revisited

Fech Scen Khoo, Yen Chin Ong

arxiv:1605.05774 v3 · 2016-05-18 · gr-qc · 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{6AI4UBBWC5XMVHV3UNB7LEQCD2}

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	2026-05-18T00:39:18.392284Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f011ca0436176eca9ebba343f592021ebba5cfd1fdedabd98e3e1310fb85ca07

Aliases

arxiv: 1605.05774 · arxiv_version: 1605.05774v3 · doi: 10.48550/arxiv.1605.05774 · pith_short_12: 6AI4UBBWC5XM · pith_short_16: 6AI4UBBWC5XMVHV3 · pith_short_8: 6AI4UBBW

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/6AI4UBBWC5XMVHV3UNB7LEQCD2 \
  | 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: f011ca0436176eca9ebba343f592021ebba5cfd1fdedabd98e3e1310fb85ca07

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "79f069d435ae487a8e3e8c904c0df9199fb3bb43a3376f4f15892c63460a4b29",
    "cross_cats_sorted": [
      "hep-th"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2016-05-18T22:13:57Z",
    "title_canon_sha256": "a9f14b7d50a510a85b3ec8ffda41b89fb929d69116aa90419b7619a656620fe4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1605.05774",
    "kind": "arxiv",
    "version": 3
  }
}