Pith Number

pith:SQRDPNAD

pith:2015:SQRDPNADV6YQ4J6YDC36K7DR5F

not attested not anchored not stored refs pending

20 K superconductivity in heavily electron doped surface layer of FeSe bulk crystal

B. S. Kim, B. Y. Kim, C. Kim, J. D. Denlinger, J. J. Seo, J. K. Jeong, J. M. Ok, J. S. Kim, Y. K. Kim

arxiv:1511.07950 v2 · 2015-11-25 · 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{SQRDPNADV6YQ4J6YDC36K7DR5F}

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	2026-05-18T01:16:17.073716Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

942237b403afb10e27d818b7e57c71e9753c4fec0723d9929cdf9d090a286d9d

Aliases

arxiv: 1511.07950 · arxiv_version: 1511.07950v2 · doi: 10.48550/arxiv.1511.07950 · pith_short_12: SQRDPNADV6YQ · pith_short_16: SQRDPNADV6YQ4J6Y · pith_short_8: SQRDPNAD

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/SQRDPNADV6YQ4J6YDC36K7DR5F \
  | 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: 942237b403afb10e27d818b7e57c71e9753c4fec0723d9929cdf9d090a286d9d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8f5fa01ecf6f62d5f53d0c39f8ee51ca5d960a5af6aa8a3ae151bde955d2d3fe",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cond-mat.supr-con",
    "submitted_at": "2015-11-25T05:11:27Z",
    "title_canon_sha256": "0b85c53e52247f679a455cd0852a34371a9a12b0b1565709c1d88ac88f65b6d1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1511.07950",
    "kind": "arxiv",
    "version": 2
  }
}