Pith Number

pith:OR2MQFIW

pith:2019:OR2MQFIWD7V3D37TEBOGQOIHJS

not attested not anchored not stored refs pending

Exponential-time quantum algorithms for graph coloring problems

Kazuya Shimizu, Ryuhei Mori

arxiv:1907.00529 v1 · 2019-07-01 · cs.DS · 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{OR2MQFIWD7V3D37TEBOGQOIHJS}

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	2026-05-17T23:41:51.320234Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7474c815161febb1eff3205c6839074cb28e27c85d82e5cfae58ea6382387b2b

Aliases

arxiv: 1907.00529 · arxiv_version: 1907.00529v1 · doi: 10.48550/arxiv.1907.00529 · pith_short_12: OR2MQFIWD7V3 · pith_short_16: OR2MQFIWD7V3D37T · pith_short_8: OR2MQFIW

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/OR2MQFIWD7V3D37TEBOGQOIHJS \
  | 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: 7474c815161febb1eff3205c6839074cb28e27c85d82e5cfae58ea6382387b2b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3b2300785c94e535c079b7188263e3daa50be08841527f8d03c1e5a0b3586fbd",
    "cross_cats_sorted": [
      "quant-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2019-07-01T03:35:48Z",
    "title_canon_sha256": "bb516e6aaad96f1b308d14245ee9229ce18afa980c2f666d768893b3d4c2c8e7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1907.00529",
    "kind": "arxiv",
    "version": 1
  }
}