Pith Number

pith:3TN37XEH

pith:2020:3TN37XEHC6RJJZAGXGRXPUBLP4

not attested not anchored not stored refs pending

A no-go theorem for the persistent reality of Wigner's friend's perception

Flavio Del Santo, Philippe Allard Gu\'erin, \v{C}aslav Brukner, Veronika Baumann

arxiv:2009.09499 v2 · 2020-09-20 · 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{3TN37XEHC6RJJZAGXGRXPUBLP4}

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	2026-07-05T02:40:28.921015Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

dcdbbfdc8717a294e406b9a377d02b7f0f83bf66057eb55c51a7d555f75acddf

Aliases

arxiv: 2009.09499 · arxiv_version: 2009.09499v2 · doi: 10.48550/arxiv.2009.09499 · pith_short_12: 3TN37XEHC6RJ · pith_short_16: 3TN37XEHC6RJJZAG · pith_short_8: 3TN37XEH

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/3TN37XEHC6RJJZAGXGRXPUBLP4 \
  | 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: dcdbbfdc8717a294e406b9a377d02b7f0f83bf66057eb55c51a7d555f75acddf

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1a9c9d8d88bc93ebda892e2f5a08ad5da267a7511743b4a7aa159c90b1e1ac30",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2020-09-20T18:56:52Z",
    "title_canon_sha256": "b549a81a07ed4c267aa5e08cad3f73e3c0663dc8e270e55c8bbb13d28458e64e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2009.09499",
    "kind": "arxiv",
    "version": 2
  }
}