Pith Number

pith:2BPOR6WJ

pith:2025:2BPOR6WJEMYK6POCC2R4LB6TQJ

not attested not anchored not stored refs pending

Finetuning Stellar Spectra Foundation Models with LoRA

Alexander S. Szalay, Xiaosheng Zhao, Yang Huang, Yuan-Sen Ting

arxiv:2507.20972 v1 · 2025-07-28 · astro-ph.IM · 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{2BPOR6WJEMYK6POCC2R4LB6TQJ}

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	2026-07-05T11:44:29.231210Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d05ee8fac92330af3dc216a3c587d382610aa52bf427f4e4feb4e118e3149719

Aliases

arxiv: 2507.20972 · arxiv_version: 2507.20972v1 · doi: 10.48550/arxiv.2507.20972 · pith_short_12: 2BPOR6WJEMYK · pith_short_16: 2BPOR6WJEMYK6POC · pith_short_8: 2BPOR6WJ

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/2BPOR6WJEMYK6POCC2R4LB6TQJ \
  | 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: d05ee8fac92330af3dc216a3c587d382610aa52bf427f4e4feb4e118e3149719

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a0fa0d264e8c82c8d902eae82c40a97d408d7c73519d11546cdf3c865acc3b8c",
    "cross_cats_sorted": [
      "astro-ph.SR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2025-07-28T16:34:11Z",
    "title_canon_sha256": "1ac2255d8badce954f134ae4b1f078dc7be2fa3a0484cf66b5f652c353085e28"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2507.20972",
    "kind": "arxiv",
    "version": 1
  }
}