Pith Number

pith:5JIF6XQY

pith:2002:5JIF6XQY2JQQ7NIZDKYR5M673O

not attested not anchored not stored refs pending

Two quantum analogues of Fisher information from a large deviation viewpoint of quantum estimation

Masahito Hayashi

arxiv:quant-ph/0202003 v4 · 2002-02-01 · quant-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{5JIF6XQY2JQQ7NIZDKYR5M673O}

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	2026-07-04T16:35:59.132851Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ea505f5e18d2610fb5191ab11eb3dfdb9a4fee49c389532ba478bb44dc167124

Aliases

arxiv: quant-ph/0202003 · arxiv_version: quant-ph/0202003v4 · doi: 10.48550/arxiv.quant-ph/0202003 · pith_short_12: 5JIF6XQY2JQQ · pith_short_16: 5JIF6XQY2JQQ7NIZ · pith_short_8: 5JIF6XQY

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/5JIF6XQY2JQQ7NIZDKYR5M673O \
  | 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: ea505f5e18d2610fb5191ab11eb3dfdb9a4fee49c389532ba478bb44dc167124

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5daaef08fc358575428f0e8c73377639afbb9e41ca76f24571fc3103ba146abe",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "quant-ph",
    "submitted_at": "2002-02-01T05:59:37Z",
    "title_canon_sha256": "ed4fbb117d3a828a44e1cfcbe7f8e391dfb98288afe229429c0e4ffb4897dc42"
  },
  "schema_version": "1.0",
  "source": {
    "id": "quant-ph/0202003",
    "kind": "arxiv",
    "version": 4
  }
}