Pith Number

pith:N2QCZ54H

pith:1995:N2QCZ54HBAFC5EGGTPQJXMO54P

not attested not anchored not stored refs pending

Embeddings of Cohen algebras

Jind\v{r}ich Zapletal, Saharon Shelah

arxiv:math/9502230 v1 · 1995-02-15 · 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{N2QCZ54HBAFC5EGGTPQJXMO54P}

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	2026-05-18T01:05:50.451393Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6ea02cf787080a2e90c69be09bb1dde3ecb7e0f220cd97a58c5c56f0df0a16fa

Aliases

arxiv: math/9502230 · arxiv_version: math/9502230v1 · doi: 10.48550/arxiv.math/9502230 · pith_short_12: N2QCZ54HBAFC · pith_short_16: N2QCZ54HBAFC5EGG · pith_short_8: N2QCZ54H

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/N2QCZ54HBAFC5EGGTPQJXMO54P \
  | 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: 6ea02cf787080a2e90c69be09bb1dde3ecb7e0f220cd97a58c5c56f0df0a16fa

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b682cbac1360549519f246a10119f120e2c0b8ebf539d6e939bcab4d3ef5855c",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "math.LO",
    "submitted_at": "1995-02-15T00:00:00Z",
    "title_canon_sha256": "bc7ea1ed4cb6ed6f4b993b0abdcb995f757b2a55a8a68a5977575c68a7c4525d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "math/9502230",
    "kind": "arxiv",
    "version": 1
  }
}