Pith Number

pith:PCZBRSTX

pith:2016:PCZBRSTXZXVEUOLXJOCJUQR6GO

not attested not anchored not stored refs pending

Quantum Estimation of Parameters of Classical Spacetimes

C. M. Caves, E. Knill, G. J. Milburn, J. R. van Meter, T. G. Downes

arxiv:1611.05449 v2 · 2016-11-16 · quant-ph · gr-qc · math-ph · math.MP

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{PCZBRSTXZXVEUOLXJOCJUQR6GO}

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	2026-05-18T00:30:46.571290Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

78b218ca77cdea4a39774b849a423e339621e62fb1b8ece4fb167f3c88291445

Aliases

arxiv: 1611.05449 · arxiv_version: 1611.05449v2 · doi: 10.48550/arxiv.1611.05449 · pith_short_12: PCZBRSTXZXVE · pith_short_16: PCZBRSTXZXVEUOLX · pith_short_8: PCZBRSTX

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/PCZBRSTXZXVEUOLXJOCJUQR6GO \
  | 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: 78b218ca77cdea4a39774b849a423e339621e62fb1b8ece4fb167f3c88291445

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "44d5ed4403d702de03704c62302612246e2f6cf57e21dc77c8db0ea84b52f346",
    "cross_cats_sorted": [
      "gr-qc",
      "math-ph",
      "math.MP"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2016-11-16T21:00:03Z",
    "title_canon_sha256": "c537ccb41428172af62582ebdf682ac689a8ca7d7efd2c29a68c02375334afc4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1611.05449",
    "kind": "arxiv",
    "version": 2
  }
}