Pith Number

pith:FAPCFLPQ

pith:2017:FAPCFLPQHCYBZ7QGQWW3DSMD3V

not attested not anchored not stored refs pending

Planar Graph Perfect Matching is in NC

Nima Anari, Vijay V. Vazirani

arxiv:1709.07822 v4 · 2017-09-22 · cs.DS · cs.CC · cs.DC · math.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{FAPCFLPQHCYBZ7QGQWW3DSMD3V}

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	2026-05-18T00:17:54.434327Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

281e22adf038b01cfe0685adb1c983dd49758328f9d76ed10e8776a97b5991e5

Aliases

arxiv: 1709.07822 · arxiv_version: 1709.07822v4 · doi: 10.48550/arxiv.1709.07822 · pith_short_12: FAPCFLPQHCYB · pith_short_16: FAPCFLPQHCYBZ7QG · pith_short_8: FAPCFLPQ

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/FAPCFLPQHCYBZ7QGQWW3DSMD3V \
  | 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: 281e22adf038b01cfe0685adb1c983dd49758328f9d76ed10e8776a97b5991e5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0181bcb3ae9c9618c379662b361d4e95ba3e8803b524545800f277f5f8624bd4",
    "cross_cats_sorted": [
      "cs.CC",
      "cs.DC",
      "math.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2017-09-22T15:56:53Z",
    "title_canon_sha256": "e10e91a2cb5f2bebd07b2f000ca4767ddfa90a141cb5686cb14f6b7c673ade1e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1709.07822",
    "kind": "arxiv",
    "version": 4
  }
}