Pith Number

pith:EV6MA5XR

pith:2018:EV6MA5XRXBL54M5XIIMCKMDSUN

not attested not anchored not stored refs pending

The lamppost model: effects of photon trapping, the bottom lamp and disc truncation

Andrzej A. Zdziarski, Andrzej Niedzwiecki

arxiv:1803.03781 v1 · 2018-03-10 · 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{EV6MA5XRXBL54M5XIIMCKMDSUN}

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	2026-05-18T00:17:38.330870Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

257cc076f1b857de33b74218253072a3458e4534afc04fb27860c671608ec051

Aliases

arxiv: 1803.03781 · arxiv_version: 1803.03781v1 · doi: 10.48550/arxiv.1803.03781 · pith_short_12: EV6MA5XRXBL5 · pith_short_16: EV6MA5XRXBL54M5X · pith_short_8: EV6MA5XR

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/EV6MA5XRXBL54M5XIIMCKMDSUN \
  | 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: 257cc076f1b857de33b74218253072a3458e4534afc04fb27860c671608ec051

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "22ac3e4e5d7ed1acdb1d7396fbdf228ffe56a171c19f4dbbecdf82bc364db979",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2018-03-10T09:04:31Z",
    "title_canon_sha256": "5b36a6914339856b4d7fff2240add95f616c15ce9e58b3084d20c907f2754756"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1803.03781",
    "kind": "arxiv",
    "version": 1
  }
}