Pith Number

pith:6WCGL4FH

pith:2017:6WCGL4FHBTBKIWWNM4JRGZBCBM

not attested not anchored not stored refs pending

Estimation of gradients in quantum metrology

Micha{\l} Oszmaniec, Otfried G\"uhne, Sabine W\"olk, Sanah Altenburg

arxiv:1703.09123 v2 · 2017-03-27 · 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{6WCGL4FHBTBKIWWNM4JRGZBCBM}

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	2026-05-18T00:31:55.953136Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f58465f0a70cc2a45acd67131364220b18fbc2a40251352c1516fceb124a6c1e

Aliases

arxiv: 1703.09123 · arxiv_version: 1703.09123v2 · doi: 10.48550/arxiv.1703.09123 · pith_short_12: 6WCGL4FHBTBK · pith_short_16: 6WCGL4FHBTBKIWWN · pith_short_8: 6WCGL4FH

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/6WCGL4FHBTBKIWWNM4JRGZBCBM \
  | 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: f58465f0a70cc2a45acd67131364220b18fbc2a40251352c1516fceb124a6c1e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a1c109a205724e0986c9118bb5e79a6e4aeb18fb84134dcf94b9c1564c00490f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2017-03-27T14:48:11Z",
    "title_canon_sha256": "d6bddfc5cb2ce37bf195cffe24b01c22780dd590bf5c1cde070da9b4ff6552c3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1703.09123",
    "kind": "arxiv",
    "version": 2
  }
}