Pith Number

pith:HE2635XI

pith:2014:HE2635XILRH7VBAKX3U2NROIY5

not attested not anchored not stored refs pending

A Generalization of the {\L}o\'s-Tarski Preservation Theorem over Classes of Finite Structures

Abhisekh Sankaran, Bharat Adsul, Supratik Chakraborty

arxiv:1401.5953 v1 · 2014-01-23 · cs.LO · 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{HE2635XILRH7VBAKX3U2NROIY5}

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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	2026-05-18T03:01:23.302298Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3935edf6e85c4ffa840abee9a6c5c8c76a78bc3a69d4b166a07e934d71091e99

Aliases

arxiv: 1401.5953 · arxiv_version: 1401.5953v1 · doi: 10.48550/arxiv.1401.5953 · pith_short_12: HE2635XILRH7 · pith_short_16: HE2635XILRH7VBAK · pith_short_8: HE2635XI

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/HE2635XILRH7VBAKX3U2NROIY5 \
  | 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: 3935edf6e85c4ffa840abee9a6c5c8c76a78bc3a69d4b166a07e934d71091e99

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b7ee39bd79c6dd23d1e8efe90150b751debaa47d6ff46c9437e9b5282990de01",
    "cross_cats_sorted": [
      "math.LO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LO",
    "submitted_at": "2014-01-23T12:15:37Z",
    "title_canon_sha256": "ba41f17e5c93f9e585ecafff8d949a959821d19d821f6d2207df71bd3a2c9f69"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1401.5953",
    "kind": "arxiv",
    "version": 1
  }
}