Pith Number

pith:77RM7X64

pith:2020:77RM7X64V777MALCSXOZYYYFV6

not attested not anchored not stored refs pending

Physics and Metaphysics of Wigner's Friends: Even performed pre-measurements have no results

Marcin Markiewicz, Marek \.Zukowski

arxiv:2003.07464 v6 · 2020-03-16 · 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{77RM7X64V777MALCSXOZYYYFV6}

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	2026-07-05T02:30:27.915213Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ffe2cfdfdcaffff6016295dd9c6305afbc1e343bcce4cdd56f19a58116f179c2

Aliases

arxiv: 2003.07464 · arxiv_version: 2003.07464v6 · doi: 10.48550/arxiv.2003.07464 · pith_short_12: 77RM7X64V777 · pith_short_16: 77RM7X64V777MALC · pith_short_8: 77RM7X64

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/77RM7X64V777MALCSXOZYYYFV6 \
  | 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: ffe2cfdfdcaffff6016295dd9c6305afbc1e343bcce4cdd56f19a58116f179c2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9ccd347a73a2e3d46040ec090e2b2f5123f0c1a2fc40e0da50c55c3bb28e5a02",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2020-03-16T23:04:22Z",
    "title_canon_sha256": "8987900772cf0340d24c19236e9ddad7a7a02834749ac94b5de538e1aefac808"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2003.07464",
    "kind": "arxiv",
    "version": 6
  }
}