Pith Number

pith:HAMQLPF3

pith:2007:HAMQLPF34FDCL6RYNQLEZUEVOV

not attested not anchored not stored refs pending

Upper bound on our knowledge about noncommuting observables for a qubit system

Masahito Ueda, Takahiro Sagawa, Yuji Kurotani

arxiv:quant-ph/0703130 v4 · 2007-03-15 · 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{HAMQLPF34FDCL6RYNQLEZUEVOV}

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	2026-07-04T17:08:44.192364Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

381905bcbbe14625fa386c164cd095754072f8ea6d666ffa5e9fa88398e74da6

Aliases

arxiv: quant-ph/0703130 · arxiv_version: quant-ph/0703130v4 · doi: 10.48550/arxiv.quant-ph/0703130 · pith_short_12: HAMQLPF34FDC · pith_short_16: HAMQLPF34FDCL6RY · pith_short_8: HAMQLPF3

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/HAMQLPF34FDCL6RYNQLEZUEVOV \
  | 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: 381905bcbbe14625fa386c164cd095754072f8ea6d666ffa5e9fa88398e74da6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e1047b1f497d3b789e880a48d902fcf2ead9ce1d4f9a7d0546ff1fb6a71e2d6d",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "quant-ph",
    "submitted_at": "2007-03-15T05:36:54Z",
    "title_canon_sha256": "61a738b3f0af6b79616bdbe89f6152144effeb4708dbd512a9ef992c870b64ad"
  },
  "schema_version": "1.0",
  "source": {
    "id": "quant-ph/0703130",
    "kind": "arxiv",
    "version": 4
  }
}