Pith Number

pith:NWVVIJRN

pith:2016:NWVVIJRNKROF72QISC7SPZ2USZ

not attested not anchored not stored refs pending

Bipartite Perfect Matching is in quasi-NC

Rohit Gurjar, Stephen A. Fenner, Thomas Thierauf

arxiv:1601.06319 v2 · 2016-01-23 · cs.CC · cs.DM · cs.DS

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{NWVVIJRNKROF72QISC7SPZ2USZ}

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	2026-05-18T00:10:48.972297Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6dab54262d545c5fea0890bf27e7549670e35857c5cd1681deff23fe912f1145

Aliases

arxiv: 1601.06319 · arxiv_version: 1601.06319v2 · doi: 10.48550/arxiv.1601.06319 · pith_short_12: NWVVIJRNKROF · pith_short_16: NWVVIJRNKROF72QI · pith_short_8: NWVVIJRN

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/NWVVIJRNKROF72QISC7SPZ2USZ \
  | 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: 6dab54262d545c5fea0890bf27e7549670e35857c5cd1681deff23fe912f1145

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "67671d5c1e804a9547bcbf0b888bdb96d620fd67f57b5ef3ae9377625f330f18",
    "cross_cats_sorted": [
      "cs.DM",
      "cs.DS"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CC",
    "submitted_at": "2016-01-23T22:50:22Z",
    "title_canon_sha256": "23aa8bd5e4599d68dd648b06fc26b2083598732765c87f46e3907fa97864191f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1601.06319",
    "kind": "arxiv",
    "version": 2
  }
}