Pith Number

pith:CQR6SEG5

pith:1993:CQR6SEG53NGAIZWYHI6BS7ZDH2

not attested not anchored not stored refs pending

Somewhere trivial automorphisms

Juris Stepr\=ans, Saharon Shelah

arxiv:math/9308214 v1 · 1993-08-15 · 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{CQR6SEG53NGAIZWYHI6BS7ZDH2}

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	2026-05-18T01:05:51.975358Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1423e910dddb4c0466d83a3c197f233e93ed13bc23a9572c2cddd2a654e58f1a

Aliases

arxiv: math/9308214 · arxiv_version: math/9308214v1 · doi: 10.48550/arxiv.math/9308214 · pith_short_12: CQR6SEG53NGA · pith_short_16: CQR6SEG53NGAIZWY · pith_short_8: CQR6SEG5

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/CQR6SEG53NGAIZWYHI6BS7ZDH2 \
  | 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: 1423e910dddb4c0466d83a3c197f233e93ed13bc23a9572c2cddd2a654e58f1a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "42562f202aab100ef9705cbeba2b8715c052c69846fbf5635d508289260fbff1",
    "cross_cats_sorted": [
      "math.GN"
    ],
    "license": "",
    "primary_cat": "math.LO",
    "submitted_at": "1993-08-15T00:00:00Z",
    "title_canon_sha256": "e36e40ba402d70af03b3bf4a78d33a60f20530f03f3a916c04b826028a48684e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "math/9308214",
    "kind": "arxiv",
    "version": 1
  }
}