Pith Number

pith:IPD4JFYE

pith:2021:IPD4JFYEMJKQHBADGU5LBGBDCJ

not attested not anchored not stored refs pending

R Coronae Borealis and dustless Hydrogen-deficient Carbon stars have different oxygen isotope ratios

Courtney Crawford, Edward Montiel, Geoff Clayton, Mansi Kasliwal, Patrick Tisserand, Shreya Anand, Tom Geballe, Viraj Karambelkar

arxiv:2112.07692 v1 · 2021-12-14 · astro-ph.SR · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{IPD4JFYEMJKQHBADGU5LBGBDCJ}

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	2026-07-05T05:16:17.644189Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

43c7c497046255038403353ab09823126e92153769539bba5a3215abea82412d

Aliases

arxiv: 2112.07692 · arxiv_version: 2112.07692v1 · doi: 10.48550/arxiv.2112.07692 · pith_short_12: IPD4JFYEMJKQ · pith_short_16: IPD4JFYEMJKQHBAD · pith_short_8: IPD4JFYE

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/IPD4JFYEMJKQHBADGU5LBGBDCJ \
  | 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: 43c7c497046255038403353ab09823126e92153769539bba5a3215abea82412d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "080a8cad76c1d3f8352b6e2800432d08e48428f930c340986caf4dcc3adc9f6c",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2021-12-14T19:00:05Z",
    "title_canon_sha256": "d132c28b777f08b93892902a25317d40233c7f902e364c30d952803f0ad59976"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2112.07692",
    "kind": "arxiv",
    "version": 1
  }
}