Pith Number

pith:NNRD2XNG

pith:2012:NNRD2XNGWB36AA56DGG7BPHQBN

not attested not anchored not stored refs pending

Are quantum states real?

Lucien Hardy

arxiv:1205.1439 v3 · 2012-05-07 · quant-ph · gr-qc · hep-th

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{NNRD2XNGWB36AA56DGG7BPHQBN}

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	2026-05-18T01:57:37.216349Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6b623d5da6b077e003be198df0bcf00b55abc85debc1d36de41ebe2beb9a327c

Aliases

arxiv: 1205.1439 · arxiv_version: 1205.1439v3 · doi: 10.48550/arxiv.1205.1439 · pith_short_12: NNRD2XNGWB36 · pith_short_16: NNRD2XNGWB36AA56 · pith_short_8: NNRD2XNG

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/NNRD2XNGWB36AA56DGG7BPHQBN \
  | 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: 6b623d5da6b077e003be198df0bcf00b55abc85debc1d36de41ebe2beb9a327c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "fab395093f1ca680c51ed033ec4c1fc7f25650fd0971f91d7ac1466e42ab91af",
    "cross_cats_sorted": [
      "gr-qc",
      "hep-th"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2012-05-07T15:55:33Z",
    "title_canon_sha256": "e933e99bb145c338c36a5068128d08be8b269e220b5e77849a3144afedd8d2f8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1205.1439",
    "kind": "arxiv",
    "version": 3
  }
}