Pith Number

pith:LR66YFHE

pith:2020:LR66YFHEXOKMG7Q3GYJTOTN2DB

not attested not anchored not stored refs pending

Does the shape of the shadow of a black hole depend on motional status of an observer?

Qing-Hua Zhu, Zhe Chang

arxiv:2006.00685 v2 · 2020-06-01 · 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{LR66YFHEXOKMG7Q3GYJTOTN2DB}

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

A note on methods for computing the critical curve of Kerr-like black holes

Receipt and verification

First computed	2026-07-05T01:25:38.973119Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5c7dec14e4bb94c37e1b3613374dba1877e0ddcb015715afd09ff3cfe9d9f020

Aliases

arxiv: 2006.00685 · arxiv_version: 2006.00685v2 · doi: 10.48550/arxiv.2006.00685 · pith_short_12: LR66YFHEXOKM · pith_short_16: LR66YFHEXOKMG7Q3 · pith_short_8: LR66YFHE

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/LR66YFHEXOKMG7Q3GYJTOTN2DB \
  | 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: 5c7dec14e4bb94c37e1b3613374dba1877e0ddcb015715afd09ff3cfe9d9f020

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9bbecd0adf3f4824c9a7edfada465af5ffc407d3c5c4a2611734cd2b7d7c90c1",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2020-06-01T03:16:46Z",
    "title_canon_sha256": "d3d00e048b839919e0ffa41e33d37b377f66b018987fc2a1b2096132eb05191e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2006.00685",
    "kind": "arxiv",
    "version": 2
  }
}