Pith Number

pith:SMT4T4N4

pith:2019:SMT4T4N4S4NMPKRFX3UDDJQINU

not attested not anchored not stored refs pending

Comment on "Optimal convex approximations of quantum states"

Bo Li, Shao-Ming Fei, Xiao-Bin Liang

arxiv:1901.08848 v1 · 2019-01-25 · 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{SMT4T4N4S4NMPKRFX3UDDJQINU}

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	2026-05-17T23:55:32.916329Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9327c9f1bc971ac7aa25bee831a6086d0a58316e4b57560ffd528214035154d6

Aliases

arxiv: 1901.08848 · arxiv_version: 1901.08848v1 · doi: 10.48550/arxiv.1901.08848 · pith_short_12: SMT4T4N4S4NM · pith_short_16: SMT4T4N4S4NMPKRF · pith_short_8: SMT4T4N4

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/SMT4T4N4S4NMPKRFX3UDDJQINU \
  | 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: 9327c9f1bc971ac7aa25bee831a6086d0a58316e4b57560ffd528214035154d6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "29f57fb55f999e09bac542934657563ef01dbb73be8bd5c54648cd39d414a6bf",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2019-01-25T12:06:22Z",
    "title_canon_sha256": "fd41be6652bf6e7041c8c08862e3e3617ddb9419d120103117ba62566ea6c028"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1901.08848",
    "kind": "arxiv",
    "version": 1
  }
}