Pith Number

pith:VKKD3WCT

pith:2007:VKKD3WCTD7ZEEMMD4F5ULVPAQ4

not attested not anchored not stored refs pending

Origin of superconductivity in nominally "undoped" T'-La$_{2-x}$Y$_{x}$CuO$_{4}$ films

G. Wu, G. Y. Wang, L. Zhao, R. H. Liu, T. Wu, X. G. Luo, X. H. Chen

arxiv:cond-mat/0703643 v1 · 2007-03-25 · cond-mat.supr-con · cond-mat.mtrl-sci · 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{VKKD3WCTD7ZEEMMD4F5ULVPAQ4}

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	2026-07-04T17:08:08.739202Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

aa943dd8531ff2423183e17b45d5e0872e8a0a6446c156c694036e980045ed9f

Aliases

arxiv: cond-mat/0703643 · arxiv_version: cond-mat/0703643v1 · doi: 10.48550/arxiv.cond-mat/0703643 · pith_short_12: VKKD3WCTD7ZE · pith_short_16: VKKD3WCTD7ZEEMMD · pith_short_8: VKKD3WCT

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/VKKD3WCTD7ZEEMMD4F5ULVPAQ4 \
  | 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: aa943dd8531ff2423183e17b45d5e0872e8a0a6446c156c694036e980045ed9f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f63e716ac6e1f291868e8436d142274a0c956b575fb8a11bf07d71cbf31fe1a5",
    "cross_cats_sorted": [
      "cond-mat.mtrl-sci",
      "cond-mat.str-el"
    ],
    "license": "",
    "primary_cat": "cond-mat.supr-con",
    "submitted_at": "2007-03-25T08:56:24Z",
    "title_canon_sha256": "cce82c9ece82eaf223d673fa09ec708d1f78960064961e421e32639a42527861"
  },
  "schema_version": "1.0",
  "source": {
    "id": "cond-mat/0703643",
    "kind": "arxiv",
    "version": 1
  }
}