Pith Number

pith:UZ3JA5Q3

pith:2020:UZ3JA5Q3PD77LERISIY6VJTFO5

not attested not anchored not stored refs pending

Can the EHT M87 results be used to test general relativity?

Samuel E. Gralla

arxiv:2010.08557 v1 · 2020-10-16 · astro-ph.HE · astro-ph.GA · 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{UZ3JA5Q3PD77LERISIY6VJTFO5}

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

Rotating Black Holes with Primary Scalar Hair: Shadow Signatures in Beyond Horndeski Gravity

On the impossibility of observational confirmation of black holes

Black hole spectroscopy: from theory to experiment

Photon rings and shadows of black holes with non-minimal couplings between curvature and electromagnetic field

Receipt and verification

First computed	2026-07-05T02:08:12.479857Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a67690761b78fff592289231eaa6657748282a171570587d468e543a9da9d93a

Aliases

arxiv: 2010.08557 · arxiv_version: 2010.08557v1 · doi: 10.48550/arxiv.2010.08557 · pith_short_12: UZ3JA5Q3PD77 · pith_short_16: UZ3JA5Q3PD77LERI · pith_short_8: UZ3JA5Q3

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/UZ3JA5Q3PD77LERISIY6VJTFO5 \
  | 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: a67690761b78fff592289231eaa6657748282a171570587d468e543a9da9d93a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a61a58772e7dca0048815e5c50d9a09852e29d22cb435bd1dfeaf6870d7bd1e5",
    "cross_cats_sorted": [
      "astro-ph.GA",
      "gr-qc"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2020-10-16T18:00:01Z",
    "title_canon_sha256": "c3c47b2f0a006aaa426640fbfd55ad19521291488d1ed93334af99b13e558baa"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2010.08557",
    "kind": "arxiv",
    "version": 1
  }
}