Pith Number

pith:EGPKNAJF

pith:2021:EGPKNAJFB6N7QTSTU4QU5HEFX5

not attested not anchored not stored refs pending

The excess of cool supergiants from contemporary stellar evolution models defies the metallicity-independent Humphreys-Davidson limit

Adam S. Jermyn, Avishai Gilkis, Hugues Sana, Iair Arcavi, Laurent Mahy, Lidia M. Oskinova, Tomer Shenar, Varsha Ramachandran

arxiv:2102.03102 v1 · 2021-02-05 · 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{EGPKNAJFB6N7QTSTU4QU5HEFX5}

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	2026-07-05T02:15:42.219600Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

219ea681250f9bf84e53a7214e9c85bf4089a8a5e0c97d3bc59e41d2f9ddb9db

Aliases

arxiv: 2102.03102 · arxiv_version: 2102.03102v1 · doi: 10.48550/arxiv.2102.03102 · pith_short_12: EGPKNAJFB6N7 · pith_short_16: EGPKNAJFB6N7QTST · pith_short_8: EGPKNAJF

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/EGPKNAJFB6N7QTSTU4QU5HEFX5 \
  | 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: 219ea681250f9bf84e53a7214e9c85bf4089a8a5e0c97d3bc59e41d2f9ddb9db

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e168c94cbd7e9b91f16b65187b5369e08d8fa2c26ae0a9face50a8b4df31e53b",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2021-02-05T11:08:59Z",
    "title_canon_sha256": "67d5b4acb12a018d403f30a5750ad8e6d6f94eafd4e617c2be2d05768ed7eb14"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2102.03102",
    "kind": "arxiv",
    "version": 1
  }
}