Pith Number

pith:VDLYMDFE

pith:2018:VDLYMDFED7X6CYMWWBBVMVTLAX

not attested not anchored not stored refs pending

Automated Spectral Classification of Galaxies using Machine Learning Approach on Alibaba Cloud AI platform (PAI)

Chenzhou Cui, Ge Zhang, Yanxia Zhang, Yihan Tao

arxiv:1801.04839 v2 · 2018-01-12 · astro-ph.IM

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{VDLYMDFED7X6CYMWWBBVMVTLAX}

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	2026-05-18T00:25:50.598515Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a8d7860ca41fefe16196b04356566b05ddb24708be5a93887ed764595eb1bead

Aliases

arxiv: 1801.04839 · arxiv_version: 1801.04839v2 · doi: 10.48550/arxiv.1801.04839 · pith_short_12: VDLYMDFED7X6 · pith_short_16: VDLYMDFED7X6CYMW · pith_short_8: VDLYMDFE

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/VDLYMDFED7X6CYMWWBBVMVTLAX \
  | 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: a8d7860ca41fefe16196b04356566b05ddb24708be5a93887ed764595eb1bead

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "590260f6895a4d74ddec282ea038bc550b08e6a1a6723690df7d8e2e2ed8c848",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2018-01-12T09:59:57Z",
    "title_canon_sha256": "bf8845cc0ecc0b861bc2371c971b064db01ae588a6d689fba47cc99b72c199c0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1801.04839",
    "kind": "arxiv",
    "version": 2
  }
}