Pith Number

pith:CGXCWHMO

pith:2021:CGXCWHMOWHNPMHBOAD7GHDXP6L

not attested not anchored not stored refs pending

Qubits are not observers -- a no-go theorem

\v{C}aslav Brukner

arxiv:2107.03513 v1 · 2021-07-07 · 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{CGXCWHMOWHNPMHBOAD7GHDXP6L}

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

A refined Frauchiger--Renner paradox based on strong contextuality

Why does the wavefunction 'collapse' in relational approaches to quantum mechanics?

Receipt and verification

First computed	2026-07-05T02:56:06.699640Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

11ae2b1d8eb1daf61c2e00fe638eeff2da99dbe5aeceed2dce9f46675e91b812

Aliases

arxiv: 2107.03513 · arxiv_version: 2107.03513v1 · doi: 10.48550/arxiv.2107.03513 · pith_short_12: CGXCWHMOWHNP · pith_short_16: CGXCWHMOWHNPMHBO · pith_short_8: CGXCWHMO

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/CGXCWHMOWHNPMHBOAD7GHDXP6L \
  | 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: 11ae2b1d8eb1daf61c2e00fe638eeff2da99dbe5aeceed2dce9f46675e91b812

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e28d245cac2a5b962c5254b4aa50058d720c1fefbfa064e64a78d97f475ab1bc",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2021-07-07T22:48:16Z",
    "title_canon_sha256": "9da7c475d338e8a9a0a8e62cb67b9126af81363f961069f0d31ca738ddf621a2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2107.03513",
    "kind": "arxiv",
    "version": 1
  }
}