Pith Number

pith:P2QLZFMM

pith:1994:P2QLZFMM3ZJBT4TT5ATZ4ORNTQ

not attested not anchored not stored refs pending

Subgroups of the Baer-Specker Group with Few Endomorphisms but Large Dual

Andreas Blass, R\"udiger G\"obel

arxiv:math/9405206 v1 · 1994-05-23 · 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{P2QLZFMM3ZJBT4TT5ATZ4ORNTQ}

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	2026-05-18T01:05:51.394393Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7ea0bc958cde5219f273e8279e3a2d9c3eef6de13673565c912a8cd8df62bbfd

Aliases

arxiv: math/9405206 · arxiv_version: math/9405206v1 · doi: 10.48550/arxiv.math/9405206 · pith_short_12: P2QLZFMM3ZJB · pith_short_16: P2QLZFMM3ZJBT4TT · pith_short_8: P2QLZFMM

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/P2QLZFMM3ZJBT4TT5ATZ4ORNTQ \
  | 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: 7ea0bc958cde5219f273e8279e3a2d9c3eef6de13673565c912a8cd8df62bbfd

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5cd9488965f0f235c3456fffbcf5a3b3be5d6130b1d8f6e1d07c2dad3feccd78",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "math.LO",
    "submitted_at": "1994-05-23T00:00:00Z",
    "title_canon_sha256": "f48e10622ab50eb41f31ba88c5d44f2dfcbe48a3750366004025a724495f4753"
  },
  "schema_version": "1.0",
  "source": {
    "id": "math/9405206",
    "kind": "arxiv",
    "version": 1
  }
}