Pith Number

pith:NCK2IKUN

pith:2009:NCK2IKUNDLLWBYVQRP6OYJ5D3J

not attested not anchored not stored refs pending

Four-tangle for pure states

N. K. Sharma, S. Shelly Sharma

arxiv:0912.4363 v1 · 2009-12-22 · 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{NCK2IKUNDLLWBYVQRP6OYJ5D3J}

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	2026-05-18T04:42:35.294521Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6895a42a8d1ad760e2b08bfcec27a3da55b0ff75d4bfeb5940a5e9b96f1337a9

Aliases

arxiv: 0912.4363 · arxiv_version: 0912.4363v1 · doi: 10.48550/arxiv.0912.4363 · pith_short_12: NCK2IKUNDLLW · pith_short_16: NCK2IKUNDLLWBYVQ · pith_short_8: NCK2IKUN

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/NCK2IKUNDLLWBYVQRP6OYJ5D3J \
  | 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: 6895a42a8d1ad760e2b08bfcec27a3da55b0ff75d4bfeb5940a5e9b96f1337a9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9d7851d588ce9baf4f5e1f08a6d714427d81ad21667b11ab9cd8451553904220",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2009-12-22T10:52:48Z",
    "title_canon_sha256": "c37b848ec5fb20f912277cc46796afee3e7fb3025c2f6f1f95fd4190a4d4a208"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0912.4363",
    "kind": "arxiv",
    "version": 1
  }
}