Pith Number

pith:KPYKG52L

pith:2015:KPYKG52LP6RWR4HX3JZATLTTYM

not attested not anchored not stored refs pending

Period Preserving Properties of an Invariant from the Permanent of Signed Incidence Matrices

Iain Crump, Karen Yeats, Matt DeVos

arxiv:1505.06987 v2 · 2015-05-26 · math.CO · math-ph · math.MP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{KPYKG52LP6RWR4HX3JZATLTTYM}

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	2026-05-18T01:25:55.301156Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

53f0a3774b7fa368f0f7da7209ae73c339eb0f7816e56e7f905a12f699f62b9e

Aliases

arxiv: 1505.06987 · arxiv_version: 1505.06987v2 · doi: 10.48550/arxiv.1505.06987 · pith_short_12: KPYKG52LP6RW · pith_short_16: KPYKG52LP6RWR4HX · pith_short_8: KPYKG52L

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/KPYKG52LP6RWR4HX3JZATLTTYM \
  | 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: 53f0a3774b7fa368f0f7da7209ae73c339eb0f7816e56e7f905a12f699f62b9e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "109732652d270d3795eb264eab9ae1fe3bdb76b147bfe130e15dbcbcca8b4535",
    "cross_cats_sorted": [
      "math-ph",
      "math.MP"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2015-05-26T14:59:51Z",
    "title_canon_sha256": "770515f96890e7a9d7779c9387cc9b7efbd35b0c7919cac23ab3be7fa31142e5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1505.06987",
    "kind": "arxiv",
    "version": 2
  }
}