Pith Number

pith:X2PV6GII

pith:2013:X2PV6GII7UY6KJZEJHSPXPM7JZ

not attested not anchored not stored refs pending

Parsec-scale structure of quasars: dawn of the golden age?

Roopesh Ojha

arxiv:1310.0875 v1 · 2013-10-03 · astro-ph.HE · 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{X2PV6GII7UY6KJZEJHSPXPM7JZ}

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	2026-05-18T03:11:25.210069Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

be9f5f1908fd31e5272449e4fbbd9f4e53b69d8d055946ed799b3cd0840ae8d1

Aliases

arxiv: 1310.0875 · arxiv_version: 1310.0875v1 · doi: 10.48550/arxiv.1310.0875 · pith_short_12: X2PV6GII7UY6 · pith_short_16: X2PV6GII7UY6KJZE · pith_short_8: X2PV6GII

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/X2PV6GII7UY6KJZEJHSPXPM7JZ \
  | 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: be9f5f1908fd31e5272449e4fbbd9f4e53b69d8d055946ed799b3cd0840ae8d1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "699656d0c9fc9d8b08f8f04ef7a4c32fe4af1173ba2f25ed46f190ff3da94b48",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2013-10-03T01:33:52Z",
    "title_canon_sha256": "b274bcaad4d3e62f0f8cf9b897108c9d2d7614d0e637625d1d8fef52925d9c3c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1310.0875",
    "kind": "arxiv",
    "version": 1
  }
}