Pith Number

pith:SYSTN462

pith:2019:SYSTN462XA5FWR4HMLH5KLMHTL

not attested not anchored not stored refs pending

From Hall's Marriage Theorem to Boolean Satisfiability and Back

Jonathan Lenchner

arxiv:1904.07218 v4 · 2019-04-15 · cs.CC · 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{SYSTN462XA5FWR4HMLH5KLMHTL}

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	2026-05-17T23:46:45.614852Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

962536f3dab83a5b478762cfd52d879ac5b0ea55b1ba0af847cf701c5705544f

Aliases

arxiv: 1904.07218 · arxiv_version: 1904.07218v4 · doi: 10.48550/arxiv.1904.07218 · pith_short_12: SYSTN462XA5F · pith_short_16: SYSTN462XA5FWR4H · pith_short_8: SYSTN462

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/SYSTN462XA5FWR4HMLH5KLMHTL \
  | 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: 962536f3dab83a5b478762cfd52d879ac5b0ea55b1ba0af847cf701c5705544f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3ea20e7333b20be9a8003cdd171cd9df074e6666ac6270bde4c01069fbf07da0",
    "cross_cats_sorted": [
      "math.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CC",
    "submitted_at": "2019-04-15T17:53:45Z",
    "title_canon_sha256": "966ecdf7dbe6b3c975701635dc444007b1e12495fdfb779ac38bdc4ac927d462"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1904.07218",
    "kind": "arxiv",
    "version": 4
  }
}