Pith Number

pith:2BM7WFGD

pith:2019:2BM7WFGDZ3V6KT7KE6YNMJF6YW

not attested not anchored not stored refs pending

No-Go Theorems for Quantum Resource Purification

Kun Fang, Zi-Wen Liu

arxiv:1909.02540 v4 · 2019-09-05 · 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{2BM7WFGDZ3V6KT7KE6YNMJF6YW}

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	2026-07-05T01:25:11.220820Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d059fb14c3ceebe54fea27b0d624bec5a1b66f43a00a4fb44763bbfe2ea9c59e

Aliases

arxiv: 1909.02540 · arxiv_version: 1909.02540v4 · doi: 10.48550/arxiv.1909.02540 · pith_short_12: 2BM7WFGDZ3V6 · pith_short_16: 2BM7WFGDZ3V6KT7K · pith_short_8: 2BM7WFGD

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/2BM7WFGDZ3V6KT7KE6YNMJF6YW \
  | 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: d059fb14c3ceebe54fea27b0d624bec5a1b66f43a00a4fb44763bbfe2ea9c59e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0240c69c3bacae5734d155a41a629812aeda1dcaa4f863818f861d41a29b5de2",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2019-09-05T17:27:21Z",
    "title_canon_sha256": "5ad840af67248f4b12cbbd6d0322ed1d61e9adb3516d6a8308521891c18a29fe"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1909.02540",
    "kind": "arxiv",
    "version": 4
  }
}