Pith Number

pith:QSMTBX56

pith:2005:QSMTBX56MJLOQQCZ7TQNF4BR2I

not attested not anchored not stored refs pending

The combinatorics of the Baer-Specker group

Boaz Tsaban, Michal Machura

arxiv:math/0508146 v6 · 2005-08-08 · math.GN · math.CO · math.GR · 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{QSMTBX56MJLOQQCZ7TQNF4BR2I}

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	2026-05-18T04:37:23.142095Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

849930dfbe6256e84059fce0d2f031d228e62995e771052423e97dd583ec0761

Aliases

arxiv: math/0508146 · arxiv_version: math/0508146v6 · doi: 10.48550/arxiv.math/0508146 · pith_short_12: QSMTBX56MJLO · pith_short_16: QSMTBX56MJLOQQCZ · pith_short_8: QSMTBX56

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/QSMTBX56MJLOQQCZ7TQNF4BR2I \
  | 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: 849930dfbe6256e84059fce0d2f031d228e62995e771052423e97dd583ec0761

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1f86b89c6da2c85a182960968f2e91d3f4e17f47e7dd1a79f71151b5c0ce9323",
    "cross_cats_sorted": [
      "math.CO",
      "math.GR",
      "math.LO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.GN",
    "submitted_at": "2005-08-08T15:12:32Z",
    "title_canon_sha256": "c628bfb5705a0436057642623ecbe89e9bf7d852e84a5664a341888b64c758e6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "math/0508146",
    "kind": "arxiv",
    "version": 6
  }
}