Pith Number

pith:5GFYDE25

pith:2018:5GFYDE2535AU3MZRPVDA24TXQ7

not attested not anchored not stored refs pending

Machine learning Applied to Star-Galaxy-QSO Classification and Stellar Effective Temperature Regression

Fan Yang, Jifeng Liu, Song Wang, Yu Bai

arxiv:1811.03740 v1 · 2018-11-09 · astro-ph.GA · 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{5GFYDE2535AU3MZRPVDA24TXQ7}

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	2026-05-17T23:57:37.558219Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e98b81935ddf414db3317d460d727787fd4e767109d03c292e773caeed011cba

Aliases

arxiv: 1811.03740 · arxiv_version: 1811.03740v1 · doi: 10.48550/arxiv.1811.03740 · pith_short_12: 5GFYDE2535AU · pith_short_16: 5GFYDE2535AU3MZR · pith_short_8: 5GFYDE25

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/5GFYDE2535AU3MZRPVDA24TXQ7 \
  | 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: e98b81935ddf414db3317d460d727787fd4e767109d03c292e773caeed011cba

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cff80ceba8571d657888f30506aedf017b0a9c22db40e2a97c2175a08efab917",
    "cross_cats_sorted": [
      "astro-ph.IM",
      "astro-ph.SR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2018-11-09T02:13:58Z",
    "title_canon_sha256": "19e9264dfeb10781ee9aa80fb8dea9cd318a9be9bf11af19eba293a9020bd7d4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1811.03740",
    "kind": "arxiv",
    "version": 1
  }
}