Pith Number

pith:47YUFRL3

pith:2014:47YUFRL3WYLPSFXNZRMEHDW5LK

not attested not anchored not stored refs pending

Mathias forcing and combinatorial covering properties of filters

David Chodounsk\'y, Du\v{s}an Repov\v{s}, Lyubomyr Zdomskyy

arxiv:1401.2283 v2 · 2014-01-10 · math.LO · math.GN

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{47YUFRL3WYLPSFXNZRMEHDW5LK}

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	2026-05-18T01:23:45.521286Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e7f142c57bb616f916edcc58438edd5a9bd4a8b819070eee241a361722dc057e

Aliases

arxiv: 1401.2283 · arxiv_version: 1401.2283v2 · doi: 10.48550/arxiv.1401.2283 · pith_short_12: 47YUFRL3WYLP · pith_short_16: 47YUFRL3WYLPSFXN · pith_short_8: 47YUFRL3

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/47YUFRL3WYLPSFXNZRMEHDW5LK \
  | 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: e7f142c57bb616f916edcc58438edd5a9bd4a8b819070eee241a361722dc057e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4684949c02a38fa1463aaeff15a962c1a9710e945f7c63c09cf6beaa73e840ee",
    "cross_cats_sorted": [
      "math.GN"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.LO",
    "submitted_at": "2014-01-10T11:00:15Z",
    "title_canon_sha256": "fe94491fa07d99ee00a013b939c737d2a8eef4ba671ea6a48ace05e8cb3fb6af"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1401.2283",
    "kind": "arxiv",
    "version": 2
  }
}