Pith Number

pith:QXDXZJKT

pith:2016:QXDXZJKTWZCUVNK3XTICGJPCKJ

not attested not anchored not stored refs pending

Invertibility of graphs with a unique perfect matching

Daniel Sevcovic, Sona Pavlikova

arxiv:1612.02234 v1 · 2016-12-07 · 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{QXDXZJKTWZCUVNK3XTICGJPCKJ}

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	2026-05-18T00:55:35.073574Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

85c77ca553b6454ab55bbcd02325e2526e1b1f994af5aa68033dd9d8c9be0a23

Aliases

arxiv: 1612.02234 · arxiv_version: 1612.02234v1 · doi: 10.48550/arxiv.1612.02234 · pith_short_12: QXDXZJKTWZCU · pith_short_16: QXDXZJKTWZCUVNK3 · pith_short_8: QXDXZJKT

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/QXDXZJKTWZCUVNK3XTICGJPCKJ \
  | 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: 85c77ca553b6454ab55bbcd02325e2526e1b1f994af5aa68033dd9d8c9be0a23

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "748d1c9cd2050f99d163e856f0bfa8555b38d46bcf44ca8be07b765b238b5a37",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2016-12-07T13:17:30Z",
    "title_canon_sha256": "d638720ad6de34c088f0a73a30c3ab78377a1869044694897ed87d21d1a295a4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1612.02234",
    "kind": "arxiv",
    "version": 1
  }
}