Pith Number

pith:M3HEWYPM

pith:2004:M3HEWYPMJHBX3NABWC25H2WI3K

not attested not anchored not stored refs pending

Contextuality for preparations, transformations, and unsharp measurements

R. W. Spekkens

arxiv:quant-ph/0406166 v3 · 2004-06-23 · 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{M3HEWYPMJHBX3NABWC25H2WI3K}

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.

Cited by

2 papers in Pith

The Physical and Contextual Limits of Quantum Speedup

Receipt and verification

First computed	2026-05-18T01:05:03.437762Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

66ce4b61ec49c37db401b0b5d3eac8daacddcb859635e57656917900e1351eb2

Aliases

arxiv: quant-ph/0406166 · arxiv_version: quant-ph/0406166v3 · doi: 10.48550/arxiv.quant-ph/0406166 · pith_short_12: M3HEWYPMJHBX · pith_short_16: M3HEWYPMJHBX3NAB · pith_short_8: M3HEWYPM

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/M3HEWYPMJHBX3NABWC25H2WI3K \
  | 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: 66ce4b61ec49c37db401b0b5d3eac8daacddcb859635e57656917900e1351eb2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9137871c9b8fea44b781e63789c58bf5013c1db4a5ef447e2cf4298f544d07b7",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "quant-ph",
    "submitted_at": "2004-06-23T05:19:12Z",
    "title_canon_sha256": "d52793695cf69695a39e0aef316c9c739b7a2309a966d37df49fff899a9ec12a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "quant-ph/0406166",
    "kind": "arxiv",
    "version": 3
  }
}