Pith Number

pith:27M7YBBQ

pith:2008:27M7YBBQLCFBGZJUHPHTAAOIMY

not attested not anchored not stored refs pending

Microwave Surface-Impedance Measurements of the Magnetic Penetration Depth in Single Crystal Ba1-xKxFe2As2 Superconductors: Evidence for a Disorder-Dependent Superfluid Density

C. J. van der Beek, H. Takeya, K. Hashimoto, K. Hirata, K. Ikada, M. Konczykowski, R. Okazaki, S. Kasahara, S. Tonegawa, T. Kato, T. Shibauchi, T. Terashima, Y. Matsuda

arxiv:0810.3506 v2 · 2008-10-20 · cond-mat.supr-con · cond-mat.str-el

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{27M7YBBQLCFBGZJUHPHTAAOIMY}

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	2026-07-04T15:42:40.044954Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d7d9fc0430588a1365343bcf3001c8661926d4b65fa72ab7ee66c1b224ef2d78

Aliases

arxiv: 0810.3506 · arxiv_version: 0810.3506v2 · doi: 10.48550/arxiv.0810.3506 · pith_short_12: 27M7YBBQLCFB · pith_short_16: 27M7YBBQLCFBGZJU · pith_short_8: 27M7YBBQ

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/27M7YBBQLCFBGZJUHPHTAAOIMY \
  | 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: d7d9fc0430588a1365343bcf3001c8661926d4b65fa72ab7ee66c1b224ef2d78

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9ab0e04024ecb43edf6bec4e8c461aaa47f0f7962cd2fce987ea93354284c8cd",
    "cross_cats_sorted": [
      "cond-mat.str-el"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cond-mat.supr-con",
    "submitted_at": "2008-10-20T09:54:14Z",
    "title_canon_sha256": "a0640a8aff02e97684af5f7b800a8dfcfab8c6336f2c1685bfcc84538f9e28a6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0810.3506",
    "kind": "arxiv",
    "version": 2
  }
}