Pith Number

pith:QUVIXN4W

pith:2025:QUVIXN4WNBPUPRQNQWPGI2T7PN

not attested not anchored not stored refs pending

Loops, Inverse Limits and Non-Determinism

Vasco Brattka

arxiv:2501.17734 v1 · 2025-01-29 · math.LO · cs.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{QUVIXN4WNBPUPRQNQWPGI2T7PN}

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	2026-07-05T10:06:57.143489Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

852a8bb796685f47c60d859e646a7f7b70cbccde3c7751a4ea0b7d65b0ce3be8

Aliases

arxiv: 2501.17734 · arxiv_version: 2501.17734v1 · doi: 10.48550/arxiv.2501.17734 · pith_short_12: QUVIXN4WNBPU · pith_short_16: QUVIXN4WNBPUPRQN · pith_short_8: QUVIXN4W

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/QUVIXN4WNBPUPRQNQWPGI2T7PN \
  | 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: 852a8bb796685f47c60d859e646a7f7b70cbccde3c7751a4ea0b7d65b0ce3be8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b8ddb5bc6a6b8e69893a7e19393adcbae38c3e1cc70b2d59cf62fc2b0ed81e60",
    "cross_cats_sorted": [
      "cs.LO"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "math.LO",
    "submitted_at": "2025-01-29T16:18:30Z",
    "title_canon_sha256": "35e96e78cd3418add864faad90dffd59b5117211c7c362ce481b92c39199f874"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2501.17734",
    "kind": "arxiv",
    "version": 1
  }
}