Pith Number

pith:XWMMPQNV

pith:2020:XWMMPQNVHY5XNK56DDUUGUNERT

not attested not anchored not stored refs pending

Shadow of a Spinning Black Hole in an Expanding Universe

Bin Chen, Minyong Guo, Peng-Cheng Li

arxiv:2001.04231 v2 · 2020-01-13 · 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{XWMMPQNVHY5XNK56DDUUGUNERT}

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

4 papers in Pith

Detectability of secondary images from flares near Sgr A* with mock GRAVITY data

Shadows of Giants: Constraints on Stupendously Large Black Holes from Negative Sources against the Cosmic Microwave Background

Shaving off soft hairs and the black hole image memory effect

Gravity/thermodynamics correspondence via black hole shadows

Receipt and verification

First computed	2026-07-05T00:58:46.605568Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

bd98c7c1b53e3b76abbe18e94351a48cc0f2ac9e8c97069f3921a035e9dddfc5

Aliases

arxiv: 2001.04231 · arxiv_version: 2001.04231v2 · doi: 10.48550/arxiv.2001.04231 · pith_short_12: XWMMPQNVHY5X · pith_short_16: XWMMPQNVHY5XNK56 · pith_short_8: XWMMPQNV

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/XWMMPQNVHY5XNK56DDUUGUNERT \
  | 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: bd98c7c1b53e3b76abbe18e94351a48cc0f2ac9e8c97069f3921a035e9dddfc5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "30a887a954ef0a89dc4a1372719e209dc004c20531c9fb33bec75b291c67d878",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2020-01-13T13:28:15Z",
    "title_canon_sha256": "4ad2f3e436c773e760aef328957b9bae095ad0fd6d1d94bbbaade85fcf752ff7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2001.04231",
    "kind": "arxiv",
    "version": 2
  }
}