Pith Number

pith:SRA3T6UU

pith:2013:SRA3T6UUSW57YMKMDDYH2I5K3B

not attested not anchored not stored refs pending

The spectral variability in radio-loud quasars

Minfeng Gu (SHAO)

arxiv:1304.2835 v1 · 2013-04-10 · 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{SRA3T6UUSW57YMKMDDYH2I5K3B}

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	2026-05-18T01:50:40.689818Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9441b9fa9495bbfc314c18f07d23aad86f809cf0353d1871f7100f9296244225

Aliases

arxiv: 1304.2835 · arxiv_version: 1304.2835v1 · doi: 10.48550/arxiv.1304.2835 · pith_short_12: SRA3T6UUSW57 · pith_short_16: SRA3T6UUSW57YMKM · pith_short_8: SRA3T6UU

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/SRA3T6UUSW57YMKMDDYH2I5K3B \
  | 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: 9441b9fa9495bbfc314c18f07d23aad86f809cf0353d1871f7100f9296244225

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "06c4f92c801dee756fee6a23f8528ad1f3d0c643b3bb66ce90ab0b337808ee0f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2013-04-10T03:15:06Z",
    "title_canon_sha256": "941fe07b9c81d58ef9737cb862bcc94b2126ff04a8e6fffd81e5bba2d104e491"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1304.2835",
    "kind": "arxiv",
    "version": 1
  }
}