Pith Number

pith:4FQIDFIX

pith:2006:4FQIDFIXIPU4CAZR5UWYSAOVOP

not attested not anchored not stored refs pending

Exact calculation of robustness of entanglement via convex semi-definite programming

M. A. Jafarizadeh, M. Mirzaee, M.Rezaee

arxiv:quant-ph/0608225 v1 · 2006-08-29 · 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{4FQIDFIXIPU4CAZR5UWYSAOVOP}

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	2026-05-18T01:05:02.604033Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e16081951743e9c10331ed2d8901d573c45f00d5f0604e7bc391ef314a96c1af

Aliases

arxiv: quant-ph/0608225 · arxiv_version: quant-ph/0608225v1 · doi: 10.48550/arxiv.quant-ph/0608225 · pith_short_12: 4FQIDFIXIPU4 · pith_short_16: 4FQIDFIXIPU4CAZR · pith_short_8: 4FQIDFIX

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/4FQIDFIXIPU4CAZR5UWYSAOVOP \
  | 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: e16081951743e9c10331ed2d8901d573c45f00d5f0604e7bc391ef314a96c1af

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1a1f6edc0274770b1524c0dbea439778d8fbe4a3b64f7bc8734ddd1a6d5f6684",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "quant-ph",
    "submitted_at": "2006-08-29T05:21:34Z",
    "title_canon_sha256": "6a269353fc91b7a7ff9f062fd2858cb211b20437f8d82d4e96ecf20f6c4b9ff8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "quant-ph/0608225",
    "kind": "arxiv",
    "version": 1
  }
}