Pith Number

pith:YKLZK2BV

pith:2013:YKLZK2BVM5SA3PWS4M6PNM2VOY

not attested not anchored not stored refs pending

Quantum state estimation with unknown measurements

Brian J. Smith, Merlin Cooper, Michal Karpinski

arxiv:1306.6431 v4 · 2013-06-27 · 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{YKLZK2BVM5SA3PWS4M6PNM2VOY}

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	2026-05-18T02:47:24.371776Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c29795683567640dbed2e33cf6b35576375487ea321f758c5f4046e1df2b7f29

Aliases

arxiv: 1306.6431 · arxiv_version: 1306.6431v4 · doi: 10.48550/arxiv.1306.6431 · pith_short_12: YKLZK2BVM5SA · pith_short_16: YKLZK2BVM5SA3PWS · pith_short_8: YKLZK2BV

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/YKLZK2BVM5SA3PWS4M6PNM2VOY \
  | 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: c29795683567640dbed2e33cf6b35576375487ea321f758c5f4046e1df2b7f29

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1450a80123957d37318eefdc1fa6d733f1eb88fdbb56ec91c62f8a1eed74e318",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2013-06-27T08:18:29Z",
    "title_canon_sha256": "da6ffb3f2548cc8b7c16cdf7fa1d1d75aef89adb406677aa07dc268b117088b0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1306.6431",
    "kind": "arxiv",
    "version": 4
  }
}