Pith Number

pith:K3GSY6Z6

pith:2019:K3GSY6Z6RA23PXEOTPIK5FI3DV

not attested not anchored not stored refs pending

Testing the Schwarzschild metric in a strong field region with the Event Horizon Telescope

S. X. Tian, Zong-Hong Zhu

arxiv:1908.11794 v1 · 2019-08-30 · gr-qc · astro-ph.HE

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{K3GSY6Z6RA23PXEOTPIK5FI3DV}

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

Relative Magnification Factor of Point Sources on Accretion Disks

Receipt and verification

First computed	2026-07-05T00:03:01.105283Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

56cd2c7b3e8835b7dc8e9bd0ae951b1d51de1261a4c6ea0e6aedc55ee581d991

Aliases

arxiv: 1908.11794 · arxiv_version: 1908.11794v1 · doi: 10.48550/arxiv.1908.11794 · pith_short_12: K3GSY6Z6RA23 · pith_short_16: K3GSY6Z6RA23PXEO · pith_short_8: K3GSY6Z6

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/K3GSY6Z6RA23PXEOTPIK5FI3DV \
  | 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: 56cd2c7b3e8835b7dc8e9bd0ae951b1d51de1261a4c6ea0e6aedc55ee581d991

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d0f2fb9b8aaf99fd61f17f45b99e6e4bf9fba316fd636db8d5e8b60e4d0a95a2",
    "cross_cats_sorted": [
      "astro-ph.HE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2019-08-30T15:36:22Z",
    "title_canon_sha256": "14b776fcfdeff84f18e268dc18621e429f25d1663517bb1f42fc3066310d7c56"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1908.11794",
    "kind": "arxiv",
    "version": 1
  }
}