Pith Number

pith:COCYMRDX

pith:2014:COCYMRDXIFP7MC2TLID7L7L5VP

not attested not anchored not stored refs pending

A remark on contracting inverse semigroups

Giuliano Boava, Ruy Exel

arxiv:1409.8334 v1 · 2014-09-29 · math.OA · 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{COCYMRDXIFP7MC2TLID7L7L5VP}

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	2026-05-18T02:41:25.564811Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1385864477415ff60b535a07f5fd7dabc09cbb3e715d9d7f8874a53ff3914d5f

Aliases

arxiv: 1409.8334 · arxiv_version: 1409.8334v1 · doi: 10.48550/arxiv.1409.8334 · pith_short_12: COCYMRDXIFP7 · pith_short_16: COCYMRDXIFP7MC2T · pith_short_8: COCYMRDX

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/COCYMRDXIFP7MC2TLID7L7L5VP \
  | 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: 1385864477415ff60b535a07f5fd7dabc09cbb3e715d9d7f8874a53ff3914d5f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b0250cb3be4f4f4bfc44f3ca93b9a98c24da7026aee854c4f4739dd02cb579b0",
    "cross_cats_sorted": [
      "math.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OA",
    "submitted_at": "2014-09-29T21:47:55Z",
    "title_canon_sha256": "00213f8380a72a3807c0fde5bce8f3fd42f023fbcbdeafe22d5e516316d0d45d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1409.8334",
    "kind": "arxiv",
    "version": 1
  }
}