Pith Number

pith:HBYQFV42

pith:2013:HBYQFV426OYF5V5RP3ALMFC7WE

not attested not anchored not stored refs pending

Learning the Fundamental MIR Spectral Components of Galaxies with Non-Negative Matrix Factorisation

D. Farrah, H. W. W. Spoon, P.D. Hurley, S.Oliver, V.Lebouteiller

arxiv:1310.0723 v1 · 2013-10-02 · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{HBYQFV426OYF5V5RP3ALMFC7WE}

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	2026-05-18T01:47:16.379200Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

387102d79af3b05ed7b17ec0b6145fb1024203bcd290e9d1cb75d6b44d674678

Aliases

arxiv: 1310.0723 · arxiv_version: 1310.0723v1 · doi: 10.48550/arxiv.1310.0723 · pith_short_12: HBYQFV426OYF · pith_short_16: HBYQFV426OYF5V5R · pith_short_8: HBYQFV42

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/HBYQFV426OYF5V5RP3ALMFC7WE \
  | 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: 387102d79af3b05ed7b17ec0b6145fb1024203bcd290e9d1cb75d6b44d674678

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1ed18e3bfc09808b15043be1d5321b6389e0dcf287bd261c2824c63dbb28a5b0",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2013-10-02T14:55:05Z",
    "title_canon_sha256": "650f876622ef087f900c3bd23989b318ddee5c3454a2a51dc48ff1082e753941"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1310.0723",
    "kind": "arxiv",
    "version": 1
  }
}