Pith Number

pith:SCBVP2IT

pith:2001:SCBVP2IT5OQ25MBEIAFBTDFKWN

not attested not anchored not stored refs pending

Universal Quantum Estimator

Artur K. Ekert, Carolina Moura Alves, Daniel K. L. Oi, L. C. Kwek, Michal Horodecki, Pawel Horodecki

arxiv:quant-ph/0112073 v1 · 2001-12-12 · 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{SCBVP2IT5OQ25MBEIAFBTDFKWN}

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	2026-05-18T03:24:20.407125Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

908357e913eba1aeb024400a198caab35921ecbd056db4fb034303ca455caed7

Aliases

arxiv: quant-ph/0112073 · arxiv_version: quant-ph/0112073v1 · doi: 10.48550/arxiv.quant-ph/0112073 · pith_short_12: SCBVP2IT5OQ2 · pith_short_16: SCBVP2IT5OQ25MBE · pith_short_8: SCBVP2IT

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/SCBVP2IT5OQ25MBEIAFBTDFKWN \
  | 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: 908357e913eba1aeb024400a198caab35921ecbd056db4fb034303ca455caed7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "13809274e555b27fa067842dfe9463b4e81eb83cc95dd9791c349584fe6c9a60",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "quant-ph",
    "submitted_at": "2001-12-12T17:32:36Z",
    "title_canon_sha256": "af6fc6980081bdd21c49830d0650e8907da914db947ed17c7ac1aec1bc326b95"
  },
  "schema_version": "1.0",
  "source": {
    "id": "quant-ph/0112073",
    "kind": "arxiv",
    "version": 1
  }
}