Pith Number

pith:NQ76F6P4

pith:2017:NQ76F6P4X74NCSKDTHPZSNB3LU

not attested not anchored not stored refs pending

Partial actions and an embedding theorem for inverse semigroups

Mykola Khrypchenko

arxiv:1702.00059 v5 · 2017-01-31 · 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{NQ76F6P4X74NCSKDTHPZSNB3LU}

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	2026-05-18T00:19:14.122657Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6c3fe2f9fcbff8d1494399df99343b5d3455d39ddba0202b1bcd34e5ff8515f9

Aliases

arxiv: 1702.00059 · arxiv_version: 1702.00059v5 · doi: 10.48550/arxiv.1702.00059 · pith_short_12: NQ76F6P4X74N · pith_short_16: NQ76F6P4X74NCSKD · pith_short_8: NQ76F6P4

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/NQ76F6P4X74NCSKDTHPZSNB3LU \
  | 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: 6c3fe2f9fcbff8d1494399df99343b5d3455d39ddba0202b1bcd34e5ff8515f9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "001b39a3a68140e273f585253d6ff50b838358b2633a982274df5e0cc4c5346a",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.GR",
    "submitted_at": "2017-01-31T21:27:01Z",
    "title_canon_sha256": "85f1ded4b98cb9fdfe2a44e3718e737b33390a578a2d9e79351d286ed57f7471"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1702.00059",
    "kind": "arxiv",
    "version": 5
  }
}