Pith Number

pith:TVQU5M6M

pith:2003:TVQU5M6MINQM46C6OJQP2MCPEG

not attested not anchored not stored refs pending

Superconductivity in a layered cobalt oxyhydrate Na$_{0.31}$CoO$_{2}\cdot$1.3H$_{2}$O

Chunmu Feng, Guanghan Cao, Jingqin Shen, Minghu Fang, Wen Lu, Yi Xu, Zhu'an Xu

arxiv:cond-mat/0305503 v2 · 2003-05-21 · 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{TVQU5M6MINQM46C6OJQP2MCPEG}

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	2026-07-04T16:38:49.841286Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9d614eb3cc4360ce785e7260fd304f218c533e6ea7aeb373c6b954ca420f49b2

Aliases

arxiv: cond-mat/0305503 · arxiv_version: cond-mat/0305503v2 · doi: 10.48550/arxiv.cond-mat/0305503 · pith_short_12: TVQU5M6MINQM · pith_short_16: TVQU5M6MINQM46C6 · pith_short_8: TVQU5M6M

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/TVQU5M6MINQM46C6OJQP2MCPEG \
  | 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: 9d614eb3cc4360ce785e7260fd304f218c533e6ea7aeb373c6b954ca420f49b2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "756fc0ed65db5e2a5f982438dacebbbf6b0d770147d89bec974af3f0f35b3e3b",
    "cross_cats_sorted": [
      "cond-mat.str-el"
    ],
    "license": "",
    "primary_cat": "cond-mat.supr-con",
    "submitted_at": "2003-05-21T17:21:39Z",
    "title_canon_sha256": "369dd196c56557d4f83d65a63ac4595be16aa5c9546b286793c788bf5d79d2bc"
  },
  "schema_version": "1.0",
  "source": {
    "id": "cond-mat/0305503",
    "kind": "arxiv",
    "version": 2
  }
}