Pith Number

pith:5UPMP2PM

pith:2018:5UPMP2PMULZHPPBELMHFQBO6OW

not attested not anchored not stored refs pending

The Dark Side of the Sun A Plea for a Next-Generation Opacity Calculation

Regner Trampedach

arxiv:1804.03746 v1 · 2018-04-10 · astro-ph.SR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{5UPMP2PMULZHPPBELMHFQBO6OW}

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	2026-05-18T00:18:43.185204Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ed1ec7e9eca2f277bc245b0e5805de7592f8ebe6a6c7fe0e692371e930fbc03e

Aliases

arxiv: 1804.03746 · arxiv_version: 1804.03746v1 · doi: 10.48550/arxiv.1804.03746 · pith_short_12: 5UPMP2PMULZH · pith_short_16: 5UPMP2PMULZHPPBE · pith_short_8: 5UPMP2PM

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/5UPMP2PMULZHPPBELMHFQBO6OW \
  | 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: ed1ec7e9eca2f277bc245b0e5805de7592f8ebe6a6c7fe0e692371e930fbc03e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "66287bbce08684a72a46a4cd3886a9abf4ff6d76393ea6e7eadf71c5b473f555",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2018-04-10T23:08:57Z",
    "title_canon_sha256": "c9b9c27547e3ed917b50cf04db679319f6a57a51c180843157badf25ffc521b8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1804.03746",
    "kind": "arxiv",
    "version": 1
  }
}