Pith Number

pith:YK6IQZMV

pith:2014:YK6IQZMVVHF2VY4SULZZ4UZDJ6

not attested not anchored not stored refs pending

McCammond's normal forms for free aperiodic semigroups revisited

Jorge Almeida, Jos\'e Carlos Costa, Marc Zeitoun

arxiv:1406.0888 v1 · 2014-06-03 · cs.FL

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{YK6IQZMVVHF2VY4SULZZ4UZDJ6}

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	2026-05-17T23:53:34.859761Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c2bc886595a9cbaae392a2f39e53234f9afe319641a8926366fba554e4cbde21

Aliases

arxiv: 1406.0888 · arxiv_version: 1406.0888v1 · doi: 10.48550/arxiv.1406.0888 · pith_short_12: YK6IQZMVVHF2 · pith_short_16: YK6IQZMVVHF2VY4S · pith_short_8: YK6IQZMV

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/YK6IQZMVVHF2VY4SULZZ4UZDJ6 \
  | 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: c2bc886595a9cbaae392a2f39e53234f9afe319641a8926366fba554e4cbde21

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4e3b43a0b3523209101abc5e10fe5d256db51b7b4661fcd79f4928040c077717",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.FL",
    "submitted_at": "2014-06-03T21:50:25Z",
    "title_canon_sha256": "3412ecb8e4ee9191743c4bab42c910ab2a76004b0c13e3ff0b50d1adb7acbfd5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1406.0888",
    "kind": "arxiv",
    "version": 1
  }
}