Pith Number

pith:4BJGL5LH

pith:2007:4BJGL5LHASAU4LI7TETUCBQ7Y2

not attested not anchored not stored refs pending

Continuous selections and sigma-spaces

Boaz Tsaban, Du\v{s}an Repov\v{s}, Lyubomyr Zdomskyy

arxiv:0705.2867 v3 · 2007-05-20 · math.GN · 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{4BJGL5LHASAU4LI7TETUCBQ7Y2}

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	2026-05-18T04:16:12.400230Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e05265f56704814e2d1f992741061fc6bc5989fa8e664dd8d446da4666ef972c

Aliases

arxiv: 0705.2867 · arxiv_version: 0705.2867v3 · doi: 10.48550/arxiv.0705.2867 · pith_short_12: 4BJGL5LHASAU · pith_short_16: 4BJGL5LHASAU4LI7 · pith_short_8: 4BJGL5LH

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/4BJGL5LHASAU4LI7TETUCBQ7Y2 \
  | 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: e05265f56704814e2d1f992741061fc6bc5989fa8e664dd8d446da4666ef972c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "dd5c3da63f8899718fb2d52262e00ee46c7c31e6f6977c9dbcff8a3a60fc4d08",
    "cross_cats_sorted": [
      "math.LO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.GN",
    "submitted_at": "2007-05-20T14:17:28Z",
    "title_canon_sha256": "392615b049df81ce66602c098fd2876486344af6276a20c6bd8d74a27e40913e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0705.2867",
    "kind": "arxiv",
    "version": 3
  }
}