Pith Number

pith:PCI33572

pith:2018:PCI33572FPHAX2RG5ZBJ27FQDX

not attested not anchored not stored refs pending

Joins and meets in the structure of Ceers

Andrea Sorbi, Uri Andrews

arxiv:1802.09249 v2 · 2018-02-26 · 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{PCI33572FPHAX2RG5ZBJ27FQDX}

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	2026-05-18T00:04:07.944468Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7891bdf7fa2bce0bea26ee429d7cb01de184ae909c02795af470506c744ecfef

Aliases

arxiv: 1802.09249 · arxiv_version: 1802.09249v2 · doi: 10.48550/arxiv.1802.09249 · pith_short_12: PCI33572FPHA · pith_short_16: PCI33572FPHAX2RG · pith_short_8: PCI33572

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/PCI33572FPHAX2RG5ZBJ27FQDX \
  | 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: 7891bdf7fa2bce0bea26ee429d7cb01de184ae909c02795af470506c744ecfef

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a23150d6d621197d1fd9681139c7f34d0ae38b2bede63ee2d01c13df33318091",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.LO",
    "submitted_at": "2018-02-26T11:25:11Z",
    "title_canon_sha256": "b5cdccbc3df8cd3c4ff0cf7000c0035ee4ddcb3fd99a5387a35d932c40428dab"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1802.09249",
    "kind": "arxiv",
    "version": 2
  }
}