Pith Number

pith:HHHQYZA3

pith:2013:HHHQYZA3UTNMN6SLIKAUFFJWBO

not attested not anchored not stored refs pending

Quasar Absorption Lines in the Far Ultraviolet: An Untapped Gold Mine for Galaxy Evolution Studies

Todd Tripp (UMass)

arxiv:1303.0043 v1 · 2013-02-28 · 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{HHHQYZA3UTNMN6SLIKAUFFJWBO}

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	2026-05-18T03:32:07.012565Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

39cf0c641ba4dac6fa4b42814295360b9a17caf98cd90b2a39ee842eef5ea2bb

Aliases

arxiv: 1303.0043 · arxiv_version: 1303.0043v1 · doi: 10.48550/arxiv.1303.0043 · pith_short_12: HHHQYZA3UTNM · pith_short_16: HHHQYZA3UTNMN6SL · pith_short_8: HHHQYZA3

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/HHHQYZA3UTNMN6SLIKAUFFJWBO \
  | 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: 39cf0c641ba4dac6fa4b42814295360b9a17caf98cd90b2a39ee842eef5ea2bb

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9a34b631647fe6be3c37f3e1ab2d830c488ccaad2cf87342b23a25963f58441f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2013-02-28T23:25:12Z",
    "title_canon_sha256": "ab59c035e020eb467c43397485c6342c8c9e0219a536e739edd9359bc2f94d62"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1303.0043",
    "kind": "arxiv",
    "version": 1
  }
}