Pith Number

pith:DU2EEY4Z

pith:2010:DU2EEY4ZOW4V5WFQ25HNCAXH6V

not attested not anchored not stored refs pending

Decision Tree Classifiers for Star/Galaxy Separation

E. C. Vasconcellos, F. L. LaBarbera, H. F. Campos Velho, H. V. Capelato, M. Trevisan, R. R. de Carvalho, R. R. Gal, R. S. R. Ruiz

arxiv:1011.1951 v1 · 2010-11-09 · astro-ph.CO · 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{DU2EEY4ZOW4V5WFQ25HNCAXH6V}

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	2026-05-18T02:04:50.177234Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1d3442639975b95ed8b0d74ed102e7f546b6444d55148b50c734f5bcc1ccfdb9

Aliases

arxiv: 1011.1951 · arxiv_version: 1011.1951v1 · doi: 10.48550/arxiv.1011.1951 · pith_short_12: DU2EEY4ZOW4V · pith_short_16: DU2EEY4ZOW4V5WFQ · pith_short_8: DU2EEY4Z

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/DU2EEY4ZOW4V5WFQ25HNCAXH6V \
  | 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: 1d3442639975b95ed8b0d74ed102e7f546b6444d55148b50c734f5bcc1ccfdb9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8c841f9b00caf5b1e289f388301f8b3e775456d0758ae47e5a85e61deebc8807",
    "cross_cats_sorted": [
      "astro-ph.IM"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2010-11-09T00:47:01Z",
    "title_canon_sha256": "9f05e1f5634d828dfcfe0ef2664a8e2898942360e2ddbac81a040e64d4f2d6be"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1011.1951",
    "kind": "arxiv",
    "version": 1
  }
}