Pith Number

pith:NYFD2E3J

pith:2018:NYFD2E3JSJRSW4QJTLGJRP6HJT

not attested not anchored not stored refs pending

General purpose ray-tracing and polarized radiative transfer in General Relativity

Joonas N\"attil\"a, Matias Mannerkoski, Pauli Pihajoki, Peter H. Johansson

arxiv:1804.04670 v2 · 2018-04-12 · astro-ph.HE · astro-ph.IM · 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{NYFD2E3JSJRSW4QJTLGJRP6HJT}

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.

Receipt and verification

First computed	2026-05-18T00:07:07.868636Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6e0a3d136992632b72099acc98bfc74cf46f92a8a3e0702301c0c40c8e04ebb4

Aliases

arxiv: 1804.04670 · arxiv_version: 1804.04670v2 · doi: 10.48550/arxiv.1804.04670 · pith_short_12: NYFD2E3JSJRS · pith_short_16: NYFD2E3JSJRSW4QJ · pith_short_8: NYFD2E3J

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/NYFD2E3JSJRSW4QJTLGJRP6HJT \
  | 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: 6e0a3d136992632b72099acc98bfc74cf46f92a8a3e0702301c0c40c8e04ebb4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "718f648c472bf1b9235a250cceba7d91bb05c5f9320c6aa382fc18c4f3506699",
    "cross_cats_sorted": [
      "astro-ph.IM",
      "gr-qc"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2018-04-12T18:00:02Z",
    "title_canon_sha256": "c227d3d367dc90f3fb57f149e643005decb1b8aa64fef13c53cf5257bf21012c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1804.04670",
    "kind": "arxiv",
    "version": 2
  }
}