Pith Number

pith:635YCNZT

pith:2018:635YCNZTUFMOARE5GDEKFCK6GC

not attested not anchored not stored refs pending

On the hardness of deciding the equality of the induced and the uniquely restricted matching number

Maximilian F\"urst

arxiv:1812.09038 v1 · 2018-12-21 · 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{635YCNZTUFMOARE5GDEKFCK6GC}

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	2026-05-17T23:57:45.575640Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f6fb813733a158e0449d30c8a2895e308601d37525c1a12208f5dea2332e6db7

Aliases

arxiv: 1812.09038 · arxiv_version: 1812.09038v1 · doi: 10.48550/arxiv.1812.09038 · pith_short_12: 635YCNZTUFMO · pith_short_16: 635YCNZTUFMOARE5 · pith_short_8: 635YCNZT

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/635YCNZTUFMOARE5GDEKFCK6GC \
  | 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: f6fb813733a158e0449d30c8a2895e308601d37525c1a12208f5dea2332e6db7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2a97cd77e96b5e73c8ef53f207fc9189ec02c28490ccbed06b62194936b866be",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2018-12-21T10:39:48Z",
    "title_canon_sha256": "5c9e33b5fce698a1aef08cb5a5efed10529c49747467dbcf4b67301c85c57ff4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1812.09038",
    "kind": "arxiv",
    "version": 1
  }
}