Pith Number

pith:6AZZ42OH

pith:2019:6AZZ42OHVK7WRUYEVNRHMV2KYK

not attested not anchored not stored refs pending

Ideals on countable sets: a survey with questions

Carlos Uzcategui

arxiv:1902.08677 v1 · 2019-02-22 · 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{6AZZ42OHVK7WRUYEVNRHMV2KYK}

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	2026-05-17T23:52:50.388267Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f0339e69c7aabf68d304ab6276574ac2bfe08115561af331d8920998f15d31ea

Aliases

arxiv: 1902.08677 · arxiv_version: 1902.08677v1 · doi: 10.48550/arxiv.1902.08677 · pith_short_12: 6AZZ42OHVK7W · pith_short_16: 6AZZ42OHVK7WRUYE · pith_short_8: 6AZZ42OH

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/6AZZ42OHVK7WRUYEVNRHMV2KYK \
  | 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: f0339e69c7aabf68d304ab6276574ac2bfe08115561af331d8920998f15d31ea

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0c5bd3db83056b527dc8203ebf27bd85ee27d5aa52d2c519e22dd542a0f69989",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.LO",
    "submitted_at": "2019-02-22T21:33:33Z",
    "title_canon_sha256": "5f1ec34d8e5fbb55d3c936c22f9b22ce9a17a0380ec4b605e197a23ae6d6eba2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1902.08677",
    "kind": "arxiv",
    "version": 1
  }
}