Pith Number

pith:WRKG43KE

pith:2016:WRKG43KEXO56GVIQMVXVIX46JR

not attested not anchored not stored refs pending

A Generalization of the {\L}o\'s-Tarski Preservation Theorem

Abhisekh Sankaran

arxiv:1609.06297 v1 · 2016-09-20 · 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{WRKG43KEXO56GVIQMVXVIX46JR}

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	2026-05-18T01:04:16.246910Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b4546e6d44bbbbe35510656f545f9e4c4b55d22cdf302dd0492d2b9607137cc9

Aliases

arxiv: 1609.06297 · arxiv_version: 1609.06297v1 · doi: 10.48550/arxiv.1609.06297 · pith_short_12: WRKG43KEXO56 · pith_short_16: WRKG43KEXO56GVIQ · pith_short_8: WRKG43KE

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/WRKG43KEXO56GVIQMVXVIX46JR \
  | 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: b4546e6d44bbbbe35510656f545f9e4c4b55d22cdf302dd0492d2b9607137cc9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d9024010ae58441d19456b1ac440af1360dbcf42f83c03630a50b7989e744b0e",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LO",
    "submitted_at": "2016-09-20T19:24:55Z",
    "title_canon_sha256": "7ddb64c891b63bed30e8620abf20a38336548a4f2e6b36ae604127bb639aa866"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1609.06297",
    "kind": "arxiv",
    "version": 1
  }
}