Pith Number

pith:2VSIKKR7

pith:2013:2VSIKKR7WFFKDIH7LLUFO2PGLR

not attested not anchored not stored refs pending

The disappearance of a narrow Mg II absorption system in quasar SDSS J165501.31+260517.4

Min-Feng Gu, Yi-Ping Qin, Zhi-Fu Chen

arxiv:1311.4710 v1 · 2013-11-19 · 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{2VSIKKR7WFFKDIH7LLUFO2PGLR}

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	2026-05-18T01:46:23.130183Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d564852a3fb14aa1a0ff5ae85769e65c7c620f952a99b3c96e74a159ec97801d

Aliases

arxiv: 1311.4710 · arxiv_version: 1311.4710v1 · doi: 10.48550/arxiv.1311.4710 · pith_short_12: 2VSIKKR7WFFK · pith_short_16: 2VSIKKR7WFFKDIH7 · pith_short_8: 2VSIKKR7

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/2VSIKKR7WFFKDIH7LLUFO2PGLR \
  | 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: d564852a3fb14aa1a0ff5ae85769e65c7c620f952a99b3c96e74a159ec97801d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0a5aef86f02f15663f6d04100cac4471c9e48b71145765a2ccd482769cb11880",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2013-11-19T12:06:37Z",
    "title_canon_sha256": "e1e95b37dbbb500d440738e067352ef776945443e444843092239d34fb320aad"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1311.4710",
    "kind": "arxiv",
    "version": 1
  }
}