Pith Number

pith:KWKCIUJM

pith:2021:KWKCIUJMHCDUL7YZY7CEPSIIFW

not attested not anchored not stored refs pending

Photometric Classifications of Evolved Massive Stars: Preparing for the Era of Webb and Roman with Machine Learning

Daniela Huppenkothen, Emily M. Levesque, James R.A. Davenport, Trevor Z. Dorn-Wallenstein

arxiv:2102.02829 v2 · 2021-02-04 · astro-ph.SR · astro-ph.GA · astro-ph.IM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{KWKCIUJMHCDUL7YZY7CEPSIIFW}

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	2026-07-05T02:45:22.572100Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

559424512c388745ff19c7c447c9082d977f6e7f07d996666e9676ce6f965fb3

Aliases

arxiv: 2102.02829 · arxiv_version: 2102.02829v2 · doi: 10.48550/arxiv.2102.02829 · pith_short_12: KWKCIUJMHCDU · pith_short_16: KWKCIUJMHCDUL7YZ · pith_short_8: KWKCIUJM

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/KWKCIUJMHCDUL7YZY7CEPSIIFW \
  | 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: 559424512c388745ff19c7c447c9082d977f6e7f07d996666e9676ce6f965fb3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "44866fcadd6b24ae3aa102becaac8e2e0328ebf6b8bbfb66a79013c59c95c5f1",
    "cross_cats_sorted": [
      "astro-ph.GA",
      "astro-ph.IM"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2021-02-04T19:00:01Z",
    "title_canon_sha256": "cd0a74446b566d23ff4aa3044d8fbdb4a486c9102406cf64c51d470445124f5c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2102.02829",
    "kind": "arxiv",
    "version": 2
  }
}