Pith Number

pith:L4XLFLGJ

pith:2018:L4XLFLGJ3MULQLZXSCQP4GW6BW

not attested not anchored not stored refs pending

The Intersection Problem for Finite Semigroups

Lukas Fleischer

arxiv:1806.04996 v1 · 2018-06-13 · 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{L4XLFLGJ3MULQLZXSCQP4GW6BW}

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	2026-05-18T00:13:20.394718Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5f2eb2acc9db28b82f3790a0fe1ade0da1c6585a555918d6e156bbe73aee8eb2

Aliases

arxiv: 1806.04996 · arxiv_version: 1806.04996v1 · doi: 10.48550/arxiv.1806.04996 · pith_short_12: L4XLFLGJ3MUL · pith_short_16: L4XLFLGJ3MULQLZX · pith_short_8: L4XLFLGJ

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/L4XLFLGJ3MULQLZXSCQP4GW6BW \
  | 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: 5f2eb2acc9db28b82f3790a0fe1ade0da1c6585a555918d6e156bbe73aee8eb2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "66a023135575220286635e10bf7212266d2d8f42cd3c5eeec13b89a356b1c07a",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.FL",
    "submitted_at": "2018-06-13T12:54:10Z",
    "title_canon_sha256": "279bc6dd692d6d23173a5b6b516d8e45af5eb2769f727ea028e9a2151ba71d88"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1806.04996",
    "kind": "arxiv",
    "version": 1
  }
}