Pith Number

pith:GFYUKFAV

pith:2010:GFYUKFAVJKANYYM5JA7HFS4ADH

not attested not anchored not stored refs pending

Any quantum state can be cloned in the presence of closed timelike curves

D. Ahn, R. B. Mann, T. C. Ralph

arxiv:1008.0221 v2 · 2010-08-02 · 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{GFYUKFAVJKANYYM5JA7HFS4ADH}

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	2026-05-18T01:43:02.076351Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

31714514154a80dc619d483e72cb8019c744bb7ea2b6801109c1cf5e4c4a7e94

Aliases

arxiv: 1008.0221 · arxiv_version: 1008.0221v2 · doi: 10.48550/arxiv.1008.0221 · pith_short_12: GFYUKFAVJKAN · pith_short_16: GFYUKFAVJKANYYM5 · pith_short_8: GFYUKFAV

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/GFYUKFAVJKANYYM5JA7HFS4ADH \
  | 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: 31714514154a80dc619d483e72cb8019c744bb7ea2b6801109c1cf5e4c4a7e94

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "177b5fa50cac507e63c4ec21180f65e88f0b6f049dc5144ec2b358e11a114c0d",
    "cross_cats_sorted": [
      "gr-qc",
      "hep-th"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2010-08-02T04:44:21Z",
    "title_canon_sha256": "d032a40c96da9aec8f871bd2c711b1da5d8d9a6d299e9ede41c847cb2f60ce39"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1008.0221",
    "kind": "arxiv",
    "version": 2
  }
}