Pith Number

pith:4IR7ZVVQ

pith:2026:4IR7ZVVQLX22LBL2USPY7MZZNG

not attested not anchored not stored refs pending

Habitable Zones Around Massive Stars: From the Main Sequence to Supergiants

Abraham Loeb, Devesh Nandal

arxiv:2602.13875 v2 · 2026-02-14 · astro-ph.SR · astro-ph.EP · 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{4IR7ZVVQLX22LBL2USPY7MZZNG}

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	2026-06-30T00:15:09.125511Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e223fcd6b05df5a5857aa49f8fb33969b3461f118cf28f4c8b42a8085fe528db

Aliases

arxiv: 2602.13875 · arxiv_version: 2602.13875v2 · doi: 10.48550/arxiv.2602.13875 · pith_short_12: 4IR7ZVVQLX22 · pith_short_16: 4IR7ZVVQLX22LBL2 · pith_short_8: 4IR7ZVVQ

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/4IR7ZVVQLX22LBL2USPY7MZZNG \
  | 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: e223fcd6b05df5a5857aa49f8fb33969b3461f118cf28f4c8b42a8085fe528db

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b6020ea2cb20990793788e656414f4375ba64e9d0d023faa7bcac5f1416be93d",
    "cross_cats_sorted": [
      "astro-ph.EP",
      "astro-ph.GA"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2026-02-14T20:28:27Z",
    "title_canon_sha256": "ef1685f4a671b383fb703f88fd5d9bc7d8fd0245ea164b01310c6d32ffaee592"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2602.13875",
    "kind": "arxiv",
    "version": 2
  }
}