Pith Number

pith:NBRN3ZLV

pith:2013:NBRN3ZLVHPTB3N5BJGAK53WZEE

not attested not anchored not stored refs pending

Emergence of superconductivity at 45 K by lanthanum and phosphorus co-doping of CaFe2As2

Jun-ichi Matsumura, Kazutaka Kudo, Keita Iba, Masataka Danura, Masaya Takasuga, Minoru Nohara, Yoshio Nogami, Yutaka Kitahama

arxiv:1303.4489 v1 · 2013-03-19 · cond-mat.supr-con

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{NBRN3ZLVHPTB3N5BJGAK53WZEE}

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	2026-05-18T03:30:27.040038Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6862dde5753be61db7a14980aeeed9211cb328a8fff47613aa057581a9c5bdb1

Aliases

arxiv: 1303.4489 · arxiv_version: 1303.4489v1 · doi: 10.48550/arxiv.1303.4489 · pith_short_12: NBRN3ZLVHPTB · pith_short_16: NBRN3ZLVHPTB3N5B · pith_short_8: NBRN3ZLV

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/NBRN3ZLVHPTB3N5BJGAK53WZEE \
  | 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: 6862dde5753be61db7a14980aeeed9211cb328a8fff47613aa057581a9c5bdb1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "86f08df368bb1f810dac85fd9f8d19915bc5b26fa50a58ad398991ec9a39915b",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cond-mat.supr-con",
    "submitted_at": "2013-03-19T05:20:50Z",
    "title_canon_sha256": "da6bc4e7160a01d3b22dd4c677cbfc7ce38d026134b8e1683aa7a32baa1c4fb6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1303.4489",
    "kind": "arxiv",
    "version": 1
  }
}