Pith Number

pith:W22EN2MG

pith:2019:W22EN2MGNC2NCG5GDLJTWCVFGY

not attested not anchored not stored refs pending

Efficient Selection of Quasar Candidates Based on Optical and Infrared Photometric Data Using Machine Learning

Dongwei Fan, Jingyi Zhang, Xin Jin, Xue-Bing Wu, Yanxia Zhang, Yongheng Zhao

arxiv:1903.03335 v2 · 2019-03-08 · astro-ph.IM · 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{W22EN2MGNC2NCG5GDLJTWCVFGY}

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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.

Cited by

1 paper in Pith

MUltiplexed Survey Telescope (MUST) Science White Paper I: Overview of Large-Scale Structure Cosmology in the Era of Stage-V Spectroscopic Surveys

Receipt and verification

First computed	2026-05-17T23:50:55.205996Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b6b446e98668b4d11ba61ad33b0aa536095703d66260bcec7b911f3276761660

Aliases

arxiv: 1903.03335 · arxiv_version: 1903.03335v2 · doi: 10.48550/arxiv.1903.03335 · pith_short_12: W22EN2MGNC2N · pith_short_16: W22EN2MGNC2NCG5G · pith_short_8: W22EN2MG

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/W22EN2MGNC2NCG5GDLJTWCVFGY \
  | 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: b6b446e98668b4d11ba61ad33b0aa536095703d66260bcec7b911f3276761660

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6d0821f080ec7c8a7ff57102d467d11b88f246d40a7ffde82d5efa0413f621cd",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2019-03-08T09:30:08Z",
    "title_canon_sha256": "564a74a2d75268cef6e49cb4422afefa85639ad06f85e62daf408a404847bc53"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1903.03335",
    "kind": "arxiv",
    "version": 2
  }
}