Pith Number

pith:4AM3N5IH

pith:2019:4AM3N5IHYCOXTXGWY6G3QL3IPE

not attested not anchored not stored refs pending

Experimental linear optical computing of the matrix permanent

Joonsuk Huh, Kang-Hee Hong, Yoon-Ho Kim, Yosep Kim

arxiv:1904.06673 v1 · 2019-04-14 · quant-ph

Open paper page JSON Open Graph Bundle Merged state What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{4AM3N5IHYCOXTXGWY6G3QL3IPE}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more

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	2026-05-17T23:46:11.749644Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e019b6f507c09d79dcd6c78db82f68792b83fae0dcea7d300fbcb08368d98147

Aliases

arxiv: 1904.06673 · arxiv_version: 1904.06673v1 · doi: 10.48550/arxiv.1904.06673 · pith_short_12: 4AM3N5IHYCOX · pith_short_16: 4AM3N5IHYCOXTXGW · pith_short_8: 4AM3N5IH

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/4AM3N5IHYCOXTXGWY6G3QL3IPE \
  | 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: e019b6f507c09d79dcd6c78db82f68792b83fae0dcea7d300fbcb08368d98147

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "fb50f2c310fdf72700b7d941e8f248c951c3e46946e22f3efecd3a1e7e78c570",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2019-04-14T10:39:31Z",
    "title_canon_sha256": "7c47a9f7eba5893cab4078bfabf51abab484af36dd170781afd89e89049ac882"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1904.06673",
    "kind": "arxiv",
    "version": 1
  }
}