Pith Number

pith:HJQ2DJMZ

pith:2012:HJQ2DJMZKKGJEOSREXTBJR2ZIT

not attested not anchored not stored refs pending

What drives the ultra-violet colours of passive galaxies?

David Carter (LJMU), John R. Lucey (Durham), Russell J. Smith (Durham)

arxiv:1201.1907 v1 · 2012-01-09 · astro-ph.CO · 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{HJQ2DJMZKKGJEOSREXTBJR2ZIT}

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	2026-05-18T01:58:53.765587Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3a61a1a599528c923a5125e614c75944fb827da3a4da0a4bc6f47b2a87c05679

Aliases

arxiv: 1201.1907 · arxiv_version: 1201.1907v1 · doi: 10.48550/arxiv.1201.1907 · pith_short_12: HJQ2DJMZKKGJ · pith_short_16: HJQ2DJMZKKGJEOSR · pith_short_8: HJQ2DJMZ

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/HJQ2DJMZKKGJEOSREXTBJR2ZIT \
  | 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: 3a61a1a599528c923a5125e614c75944fb827da3a4da0a4bc6f47b2a87c05679

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2d11d9b181b1101f68c040bff10ba76e9db86613caa66d5a2e57233e1e85b64a",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2012-01-09T21:00:02Z",
    "title_canon_sha256": "bf4d974111135df96119a94ee08c7b17c57e2e46a3766b5e694c3bae52abc1a6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1201.1907",
    "kind": "arxiv",
    "version": 1
  }
}