Pith Number

pith:FDG6W6LB

pith:2026:FDG6W6LBHJT5T6CFGAMCBZMAYL

not attested not anchored not stored refs pending

On Strong Structural Completeness of Varieties and Quasivarieties

Alex Citkin (Metropolitan Telecommunications, NewYork USA)

arxiv:2607.01271 v1 · 2026-06-30 · math.LO · cs.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{FDG6W6LBHJT5T6CFGAMCBZMAYL}

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	2026-07-03T00:16:55.970459Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

28cdeb79613a67d9f845301820e580c2df4a444b1846360d0b0b2db1c1c213e5

Aliases

arxiv: 2607.01271 · arxiv_version: 2607.01271v1 · doi: 10.48550/arxiv.2607.01271 · pith_short_12: FDG6W6LBHJT5 · pith_short_16: FDG6W6LBHJT5T6CF · pith_short_8: FDG6W6LB

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/FDG6W6LBHJT5T6CFGAMCBZMAYL \
  | 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: 28cdeb79613a67d9f845301820e580c2df4a444b1846360d0b0b2db1c1c213e5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "62ce9c4423c2e87599b5e006466d484217c9b6d160f7713fb1234a5218e03b2b",
    "cross_cats_sorted": [
      "cs.LO"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "math.LO",
    "submitted_at": "2026-06-30T15:55:48Z",
    "title_canon_sha256": "ddb1934848d3d3dc9f066b753df9ded34831259ea648a5e490eec602fa2fac79"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2607.01271",
    "kind": "arxiv",
    "version": 1
  }
}