Pith Number

pith:7WCXWTES

pith:2015:7WCXWTESZCL6OJGW4BJM7TY7RF

not attested not anchored not stored refs pending

Estimation of covariance matrix of macroscopic quantum states

L\'aszl\'o Ruppert, Radim Filip, Vladyslav C. Usenko

arxiv:1511.06650 v2 · 2015-11-20 · 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{7WCXWTESZCL6OJGW4BJM7TY7RF}

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	2026-05-18T01:14:02.261888Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fd857b4c92c897e724d6e052cfcf1f897550c41cf358965c1fb5eb4a4d33868a

Aliases

arxiv: 1511.06650 · arxiv_version: 1511.06650v2 · doi: 10.48550/arxiv.1511.06650 · pith_short_12: 7WCXWTESZCL6 · pith_short_16: 7WCXWTESZCL6OJGW · pith_short_8: 7WCXWTES

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/7WCXWTESZCL6OJGW4BJM7TY7RF \
  | 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: fd857b4c92c897e724d6e052cfcf1f897550c41cf358965c1fb5eb4a4d33868a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4b54f880d771cbe958d01b62d18fc12d4226f8b1c4f5f1a22c3cac440cc76cbb",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2015-11-20T15:45:29Z",
    "title_canon_sha256": "2ecba3078a7dc18f567da14a750168bbba4ddd884d4755724fc062d074420387"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1511.06650",
    "kind": "arxiv",
    "version": 2
  }
}