Pith Number

pith:2QRPFMWL

pith:1999:2QRPFMWLL2UHYYKJ32QU6EWOMP

not attested not anchored not stored refs pending

Fixed-N Superconductivity: The Exact Crossover from the Bulk to the Few-Electron Limit

Fabian Braun, Jan von Delft

arxiv:cond-mat/9907402 v1 · 1999-07-26 · cond-mat.supr-con · nucl-th

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{2QRPFMWLL2UHYYKJ32QU6EWOMP}

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	2026-07-04T14:23:41.344266Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d422f2b2cb5ea87c6149dea14f12ce63dc18ec0e9d9bbf9e0625a48dbcb762a9

Aliases

arxiv: cond-mat/9907402 · arxiv_version: cond-mat/9907402v1 · doi: 10.48550/arxiv.cond-mat/9907402 · pith_short_12: 2QRPFMWLL2UH · pith_short_16: 2QRPFMWLL2UHYYKJ · pith_short_8: 2QRPFMWL

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/2QRPFMWLL2UHYYKJ32QU6EWOMP \
  | 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: d422f2b2cb5ea87c6149dea14f12ce63dc18ec0e9d9bbf9e0625a48dbcb762a9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "75bf5f89395e71cb62e5e46745a78954e3863f4bec9f239bcd9109d79be102e3",
    "cross_cats_sorted": [
      "nucl-th"
    ],
    "license": "",
    "primary_cat": "cond-mat.supr-con",
    "submitted_at": "1999-07-26T18:52:47Z",
    "title_canon_sha256": "b3394ae3f58557d71294087a35d1cf37e1e6fee0fd76ae484f7680fb14f8b6a0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "cond-mat/9907402",
    "kind": "arxiv",
    "version": 1
  }
}