Pith Number

pith:T25C47EM

pith:2012:T25C47EMTKRYAIOJJQVW4CPYKG

not attested not anchored not stored refs pending

Observation of superconductivity at 30 K~46 K in AxFe2Se2 (A = Li, Na, Ba, Sr, Ca, Yb, and Eu)

G. Wang, H. Zhang, S. F. Jin, T. P. Ying, T. T. Zhou, W. Y. Wang, X. F. Lai, X. L. Chen

arxiv:1202.4340 v2 · 2012-02-20 · 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{T25C47EMTKRYAIOJJQVW4CPYKG}

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	2026-05-18T03:54:47.636971Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9eba2e7c8c9aa38021c94c2b6e09f851964052a6e790bab85d01612d20a38d00

Aliases

arxiv: 1202.4340 · arxiv_version: 1202.4340v2 · doi: 10.48550/arxiv.1202.4340 · pith_short_12: T25C47EMTKRY · pith_short_16: T25C47EMTKRYAIOJ · pith_short_8: T25C47EM

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/T25C47EMTKRYAIOJJQVW4CPYKG \
  | 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: 9eba2e7c8c9aa38021c94c2b6e09f851964052a6e790bab85d01612d20a38d00

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "04fd95c0465a0c632db5586a71373f58534db58da5bf487036e0dfecf3e2481b",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cond-mat.supr-con",
    "submitted_at": "2012-02-20T14:53:30Z",
    "title_canon_sha256": "a4764403447443172ea3f4be3b3f4ebf88d6c4253ec72ce231ecd67cd3335668"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1202.4340",
    "kind": "arxiv",
    "version": 2
  }
}