Pith Number

pith:4KUDMPWY

pith:2009:4KUDMPWYVFYDX4LPACW3XG6FWB

not attested not anchored not stored refs pending

Direct observation of a nodeless superconducting energy gap in the optical conductivity of iron-pnictides

A. A. Voronkov, B. Gorshunov, B. Holzapfel, D. Wu, F. Kurth, K. Iida, L. Schultz, M. Dressel, P. Kallina, S. Haindl

arxiv:0912.1256 v1 · 2009-12-07 · 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{4KUDMPWYVFYDX4LPACW3XG6FWB}

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	2026-07-04T17:22:28.250162Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e2a8363ed8a9703bf16f00adbb9bc5b0555759c6766b74587f96f42a33087acc

Aliases

arxiv: 0912.1256 · arxiv_version: 0912.1256v1 · doi: 10.48550/arxiv.0912.1256 · pith_short_12: 4KUDMPWYVFYD · pith_short_16: 4KUDMPWYVFYDX4LP · pith_short_8: 4KUDMPWY

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/4KUDMPWYVFYDX4LPACW3XG6FWB \
  | 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: e2a8363ed8a9703bf16f00adbb9bc5b0555759c6766b74587f96f42a33087acc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0f8dd5ca7e824f19bc9aec2b7fd83a0db71deb25458a70b70471eb7a7a888c9c",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cond-mat.supr-con",
    "submitted_at": "2009-12-07T14:36:24Z",
    "title_canon_sha256": "ad340e323ca4ba6d1301af29c9ab362eaba7464cc8380de2ebe50f7b2d2ac947"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0912.1256",
    "kind": "arxiv",
    "version": 1
  }
}