Pith Number

pith:CU4ETMVU

pith:1995:CU4ETMVUEDB6KQHE6WQKL4NYJR

not attested not anchored not stored refs pending

Partial orderings with the weak Freese-Nation property

Sabine Koppelberg, Saharon Shelah, Saka\'e Fuchino

arxiv:math/9508220 v1 · 1995-08-15 · 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{CU4ETMVUEDB6KQHE6WQKL4NYJR}

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	2026-05-18T01:05:48.383943Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

153849b2b420c3e540e4f5a0a5f1b84c5eb8cbe1596094a11445877fe30e43c1

Aliases

arxiv: math/9508220 · arxiv_version: math/9508220v1 · doi: 10.48550/arxiv.math/9508220 · pith_short_12: CU4ETMVUEDB6 · pith_short_16: CU4ETMVUEDB6KQHE · pith_short_8: CU4ETMVU

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/CU4ETMVUEDB6KQHE6WQKL4NYJR \
  | 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: 153849b2b420c3e540e4f5a0a5f1b84c5eb8cbe1596094a11445877fe30e43c1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d02f7d575b2ac38c7e85de2ffd699804f0204e50487586e0a0209867ff64bdbf",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "math.LO",
    "submitted_at": "1995-08-15T00:00:00Z",
    "title_canon_sha256": "31a2c0c17190e75c27e71d47d6c4d3fa78108cc444cde7e1c6f182f68815c976"
  },
  "schema_version": "1.0",
  "source": {
    "id": "math/9508220",
    "kind": "arxiv",
    "version": 1
  }
}