Pith Number

pith:RZKRME3F

pith:2017:RZKRME3FNGUGUZO35INYAS5NM5

not attested not anchored not stored refs pending

Idempotent ultrafilters without Zorn's Lemma

Eleftherios Tachtsis, Mauro Di Nasso

arxiv:1701.03301 v1 · 2017-01-12 · 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{RZKRME3FNGUGUZO35INYAS5NM5}

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	2026-05-18T00:52:58.003791Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8e5516136569a86a65dbea1b804bad677c3d71de94e3c49e9ab00e148ebfc43d

Aliases

arxiv: 1701.03301 · arxiv_version: 1701.03301v1 · doi: 10.48550/arxiv.1701.03301 · pith_short_12: RZKRME3FNGUG · pith_short_16: RZKRME3FNGUGUZO3 · pith_short_8: RZKRME3F

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/RZKRME3FNGUGUZO35INYAS5NM5 \
  | 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: 8e5516136569a86a65dbea1b804bad677c3d71de94e3c49e9ab00e148ebfc43d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1f8eb3641c01f38df7490ad5f33fe26528b7bd473984285b7351c3fae257505e",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.LO",
    "submitted_at": "2017-01-12T11:06:11Z",
    "title_canon_sha256": "d1cb07f2af4c3ebb0f5cf273c5b01a6b6ca94010377aa4510b9d7a08d7dd092d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1701.03301",
    "kind": "arxiv",
    "version": 1
  }
}