Pith Number

pith:KP3DW7PI

pith:2000:KP3DW7PIIDA7EOKBPRRCJFN4XI

not attested not anchored not stored refs pending

Superconductivity and Ferromagnetism from Effective Mass Reduction

J.E. Hirsch

arxiv:cond-mat/0007453 v1 · 2000-07-27 · cond-mat.str-el · 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{KP3DW7PIIDA7EOKBPRRCJFN4XI}

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	2026-05-18T01:40:08.259184Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

53f63b7de840c1f239417c622495bcba3e935638ec7b7ce96db45ee4c3c3e827

Aliases

arxiv: cond-mat/0007453 · arxiv_version: cond-mat/0007453v1 · doi: 10.48550/arxiv.cond-mat/0007453 · pith_short_12: KP3DW7PIIDA7 · pith_short_16: KP3DW7PIIDA7EOKB · pith_short_8: KP3DW7PI

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/KP3DW7PIIDA7EOKBPRRCJFN4XI \
  | 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: 53f63b7de840c1f239417c622495bcba3e935638ec7b7ce96db45ee4c3c3e827

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "56da9f93db9ad38cca1ef7ecf493d2854627a6ba07f36e8cccc96228f9d29608",
    "cross_cats_sorted": [
      "cond-mat.supr-con"
    ],
    "license": "",
    "primary_cat": "cond-mat.str-el",
    "submitted_at": "2000-07-27T23:00:00Z",
    "title_canon_sha256": "d21f96f3f9e6cded6ebc42ca3e46a7365825dd247b1b3ab2c9fba63b6ece0396"
  },
  "schema_version": "1.0",
  "source": {
    "id": "cond-mat/0007453",
    "kind": "arxiv",
    "version": 1
  }
}