Pith Number

pith:EJWT4QAH

pith:2019:EJWT4QAHMLIRMNXZUYLV4YZ44H

not attested not anchored not stored refs pending

Reference frames which separately store non-commuting conserved quantities

Ana Bel\'en Sainz, Andreas Winter, Anthony J. Short, Sandu Popescu

arxiv:1908.02713 v2 · 2019-08-07 · 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{EJWT4QAHMLIRMNXZUYLV4YZ44H}

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	2026-07-05T01:31:49.308507Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

226d3e400762d11636f9a6175e633ce1c417c343ec78494701a0b55ab2009c8e

Aliases

arxiv: 1908.02713 · arxiv_version: 1908.02713v2 · doi: 10.48550/arxiv.1908.02713 · pith_short_12: EJWT4QAHMLIR · pith_short_16: EJWT4QAHMLIRMNXZ · pith_short_8: EJWT4QAH

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/EJWT4QAHMLIRMNXZUYLV4YZ44H \
  | 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: 226d3e400762d11636f9a6175e633ce1c417c343ec78494701a0b55ab2009c8e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "12d9566de7e14bf94c62df2fc6c1a17c09d44eb99a7e30e14185e1cc9133eb44",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2019-08-07T16:34:38Z",
    "title_canon_sha256": "7702bd6ace90c65a91d4f04cbd685a66d98084ffb37642d134cf85d58a2b7216"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1908.02713",
    "kind": "arxiv",
    "version": 2
  }
}