Pith Number

pith:ZR4OALQR

pith:2015:ZR4OALQRNLSS66YN3HAVK66ZJ4

not attested not anchored not stored refs pending

Analytical solutions of the geodesic equation in the spacetime of a black hole in f(R) gravity

Claus L\"ammerzahl, Jutta Kunz, Reza Saffari, Saheb Soroushfar

arxiv:1504.07854 v2 · 2015-04-29 · 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{ZR4OALQRNLSS66YN3HAVK66ZJ4}

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

Horizon-scale tests of gravity theories and fundamental physics from the Event Horizon Telescope image of Sagittarius A$^*$

Receipt and verification

First computed	2026-05-18T01:35:10.206249Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cc78e02e116ae52f7b0dd9c1557bd94f08051f1040380b8cf6945b2e55055e4d

Aliases

arxiv: 1504.07854 · arxiv_version: 1504.07854v2 · doi: 10.48550/arxiv.1504.07854 · pith_short_12: ZR4OALQRNLSS · pith_short_16: ZR4OALQRNLSS66YN · pith_short_8: ZR4OALQR

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/ZR4OALQRNLSS66YN3HAVK66ZJ4 \
  | 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: cc78e02e116ae52f7b0dd9c1557bd94f08051f1040380b8cf6945b2e55055e4d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "de4b710c213ec79fa90d99604a1aa7be5eac418e09aad1cf561a09192a4790e8",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2015-04-29T13:35:06Z",
    "title_canon_sha256": "56c7272427e236b2b8c581f754055b5de611f3d5bcad150ce8251525c6172253"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1504.07854",
    "kind": "arxiv",
    "version": 2
  }
}