Pith Number

pith:NA3UR6UB

pith:2019:NA3UR6UBGQHRWSAAW4EDHEIPXJ

not attested not anchored not stored refs pending

Epimorphisms, dominions and H-commutative semigroups

Noor Alam, Noor Mohammad Khan, Peter M. Higgins

arxiv:1908.01813 v2 · 2019-08-05 · math.GR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{NA3UR6UBGQHRWSAAW4EDHEIPXJ}

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	2026-07-04T23:52:06.963140Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

683748fa81340f1b4800b70833910fba4a638cbc51a327406d44f642d791d30d

Aliases

arxiv: 1908.01813 · arxiv_version: 1908.01813v2 · doi: 10.48550/arxiv.1908.01813 · pith_short_12: NA3UR6UBGQHR · pith_short_16: NA3UR6UBGQHRWSAA · pith_short_8: NA3UR6UB

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/NA3UR6UBGQHRWSAAW4EDHEIPXJ \
  | 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: 683748fa81340f1b4800b70833910fba4a638cbc51a327406d44f642d791d30d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "854beb652559e07e146a6db01c6f2d9a973f0e0e9a628e2ba9ebb6ea88535100",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.GR",
    "submitted_at": "2019-08-05T19:27:14Z",
    "title_canon_sha256": "f3c4338ffe00b65d09b58cb0a602bc7888b0a671af1362afaf54a1cc9284b342"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1908.01813",
    "kind": "arxiv",
    "version": 2
  }
}