Pith Number

pith:C6KSWE4Q

pith:2018:C6KSWE4QBFFAYOWUC6NN7J7K53

not attested not anchored not stored refs pending

Model-theoretic properties of free, projective, and flat S-acts

Alena Stepanova, Alexander Mikhalev, Evgeny Palyutin, Victoria Gould

arxiv:1804.09351 v2 · 2018-04-25 · math.LO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{C6KSWE4QBFFAYOWUC6NN7J7K53}

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	2026-05-18T00:16:36.196845Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

17952b1390094a0c3ad4179adfa7eaeeebf9c2a375c9b01900a96b7c846b526a

Aliases

arxiv: 1804.09351 · arxiv_version: 1804.09351v2 · doi: 10.48550/arxiv.1804.09351 · pith_short_12: C6KSWE4QBFFA · pith_short_16: C6KSWE4QBFFAYOWU · pith_short_8: C6KSWE4Q

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/C6KSWE4QBFFAYOWUC6NN7J7K53 \
  | 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: 17952b1390094a0c3ad4179adfa7eaeeebf9c2a375c9b01900a96b7c846b526a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "174e627b29757502d0f988fd64f6ab2906de322f2636ef9da426b75def1e80e9",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.LO",
    "submitted_at": "2018-04-25T05:13:06Z",
    "title_canon_sha256": "b08a0f3719b8392c3ac38fa9b795beece71a1b12617d670e1bd4ec8d255f6708"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1804.09351",
    "kind": "arxiv",
    "version": 2
  }
}