Pith Number

pith:NPB62IQB

pith:2011:NPB62IQBHTFFPJKJ2EUCUIALBS

not attested not anchored not stored refs pending

Optimal Quantum Estimation for Gravitation

C. M. Caves, G. J. Milburn, T. G. Downes

arxiv:1108.5220 v2 · 2011-08-26 · gr-qc · math-ph · math.MP · 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{NPB62IQBHTFFPJKJ2EUCUIALBS}

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	2026-05-18T03:41:29.608528Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6bc3ed22013cca57a549d1282a200b0ca0201ed7ef57670f42ff9b18f118805e

Aliases

arxiv: 1108.5220 · arxiv_version: 1108.5220v2 · doi: 10.48550/arxiv.1108.5220 · pith_short_12: NPB62IQBHTFF · pith_short_16: NPB62IQBHTFFPJKJ · pith_short_8: NPB62IQB

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/NPB62IQBHTFFPJKJ2EUCUIALBS \
  | 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: 6bc3ed22013cca57a549d1282a200b0ca0201ed7ef57670f42ff9b18f118805e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4c4811b177e5e4ea1260ec852b694f2262d5865b57b6baf113846e1b6715b905",
    "cross_cats_sorted": [
      "math-ph",
      "math.MP",
      "quant-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2011-08-26T01:05:25Z",
    "title_canon_sha256": "e555c6435202a96c5b416d7da9ea2a04c79f116d9e518b1fe0789ac6b9af8ed5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1108.5220",
    "kind": "arxiv",
    "version": 2
  }
}