Pith Number

pith:BT2SACOH

pith:2018:BT2SACOHUDKBYM3KS4E5CSTR37

not attested not anchored not stored refs pending

On Generalization of Definitional Equivalence to Languages with Non-Disjoint Signatures

Gergely Sz\'ekely, Koen Lefever

arxiv:1802.06844 v2 · 2018-02-19 · 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{BT2SACOHUDKBYM3KS4E5CSTR37}

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	2026-05-18T00:22:44.140878Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0cf52009c7a0d41c336a9709d14a71dff7c3f59470020f254a577367734bceb0

Aliases

arxiv: 1802.06844 · arxiv_version: 1802.06844v2 · doi: 10.48550/arxiv.1802.06844 · pith_short_12: BT2SACOHUDKB · pith_short_16: BT2SACOHUDKBYM3K · pith_short_8: BT2SACOH

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/BT2SACOHUDKBYM3KS4E5CSTR37 \
  | 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: 0cf52009c7a0d41c336a9709d14a71dff7c3f59470020f254a577367734bceb0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "745df67735c25983010911a7fe721a9624bd2cc127b463dd16c067cc430a588e",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.LO",
    "submitted_at": "2018-02-19T20:46:38Z",
    "title_canon_sha256": "81360d0af1905b0131e1010b884f8172cff3bd586a6eaa867938db71d3295dd9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1802.06844",
    "kind": "arxiv",
    "version": 2
  }
}