Pith Number

pith:6DOZNJ3R

pith:2018:6DOZNJ3RPAEBWOK3I5TDS3THRO

not attested not anchored not stored refs pending

Interpolation in extensions of first-order logic

Eugenio Orlandelli, Guido Gherardi, Paolo Maffezioli

arxiv:1807.11848 v4 · 2018-07-31 · 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{6DOZNJ3RPAEBWOK3I5TDS3THRO}

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	2026-05-17T23:51:43.976323Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f0dd96a77178081b395b4766396e678ba2b0d91e77882777e85afb834aa8699e

Aliases

arxiv: 1807.11848 · arxiv_version: 1807.11848v4 · doi: 10.48550/arxiv.1807.11848 · pith_short_12: 6DOZNJ3RPAEB · pith_short_16: 6DOZNJ3RPAEBWOK3 · pith_short_8: 6DOZNJ3R

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/6DOZNJ3RPAEBWOK3I5TDS3THRO \
  | 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: f0dd96a77178081b395b4766396e678ba2b0d91e77882777e85afb834aa8699e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ea03c2c923a0ff402ea4bab7550b0cac9a8e725f94a4d67f6b0180944929b6ba",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.LO",
    "submitted_at": "2018-07-31T15:00:41Z",
    "title_canon_sha256": "1df4df47ad26b5a2b620d4115e4c82e753deaf5a2cdab04751474a01419a6cdd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1807.11848",
    "kind": "arxiv",
    "version": 4
  }
}