Pith Number

pith:LMU4ZRCI

pith:2018:LMU4ZRCICJ7OYKNYLDHLMZKUAL

not attested not anchored not stored refs pending

Fraisse classes of graded relational structures

Carles Noguera, Guillermo Badia

arxiv:1809.08141 v1 · 2018-09-21 · 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{LMU4ZRCICJ7OYKNYLDHLMZKUAL}

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	2026-05-18T00:05:10.253485Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5b29ccc448127eec29b858ceb6655402f4fb68cf9723db9845385916464d4df2

Aliases

arxiv: 1809.08141 · arxiv_version: 1809.08141v1 · doi: 10.48550/arxiv.1809.08141 · pith_short_12: LMU4ZRCICJ7O · pith_short_16: LMU4ZRCICJ7OYKNY · pith_short_8: LMU4ZRCI

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/LMU4ZRCICJ7OYKNYLDHLMZKUAL \
  | 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: 5b29ccc448127eec29b858ceb6655402f4fb68cf9723db9845385916464d4df2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2590b3aae0568cb1186afd2e1e6e4ac89a202418d18f155baeed475fe309adef",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.LO",
    "submitted_at": "2018-09-21T14:20:15Z",
    "title_canon_sha256": "2fa531eb4e4ebdd54f985fceb5b3c46e865f4840997057782212ee2c5511b869"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1809.08141",
    "kind": "arxiv",
    "version": 1
  }
}