Pith Number

pith:YYGOJKRA

pith:2021:YYGOJKRASGAU5QWTZMHCVPSY76

not attested not anchored not stored refs pending

PyQUBO: Python Library for Mapping Combinatorial Optimization Problems to QUBO Form

Kotaro Tanahashi, Mashiyat Zaman, Shu Tanaka

arxiv:2103.01708 v2 · 2021-03-02 · quant-ph · cs.ET

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{YYGOJKRASGAU5QWTZMHCVPSY76}

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	2026-07-05T02:19:58.908057Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c60ce4aa2091814ec2d3cb0e2abe58ffa30052479397b17dbf1b7cc178909130

Aliases

arxiv: 2103.01708 · arxiv_version: 2103.01708v2 · doi: 10.48550/arxiv.2103.01708 · pith_short_12: YYGOJKRASGAU · pith_short_16: YYGOJKRASGAU5QWT · pith_short_8: YYGOJKRA

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/YYGOJKRASGAU5QWTZMHCVPSY76 \
  | 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: c60ce4aa2091814ec2d3cb0e2abe58ffa30052479397b17dbf1b7cc178909130

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4b648ad798c9d88310ad916ef7666cbda4705fb28ebde6799adec33316c8f103",
    "cross_cats_sorted": [
      "cs.ET"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2021-03-02T13:31:40Z",
    "title_canon_sha256": "2124b4c75826fd0f2be39d32f5bc662619a638893870302873893b9eb703d112"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2103.01708",
    "kind": "arxiv",
    "version": 2
  }
}