Pith Number

pith:S6QDVMDU

pith:2024:S6QDVMDUPMHWBFSBMQMDE2CVEX

not attested not anchored not stored refs pending

Ulam meets Turing: constructing quadratic maps with non-computable SRB measures

Crist\'obal Rojas, Michael Yampolsky

arxiv:2501.00006 v1 · 2024-11-26 · math.DS

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{S6QDVMDUPMHWBFSBMQMDE2CVEX}

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	2026-07-05T09:55:37.494372Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

97a03ab0747b0f609641641832685525c1c6da35b0fbcdad43f5d6380e857bc8

Aliases

arxiv: 2501.00006 · arxiv_version: 2501.00006v1 · doi: 10.48550/arxiv.2501.00006 · pith_short_12: S6QDVMDUPMHW · pith_short_16: S6QDVMDUPMHWBFSB · pith_short_8: S6QDVMDU

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/S6QDVMDUPMHWBFSBMQMDE2CVEX \
  | 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: 97a03ab0747b0f609641641832685525c1c6da35b0fbcdad43f5d6380e857bc8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6214f226ebc1a5c3c5b9a889521fb704deb447ab19210f7edaee915d7f3f2562",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DS",
    "submitted_at": "2024-11-26T01:40:10Z",
    "title_canon_sha256": "1d8a85bd288b76c592c3297d21a4ee15dff37352560abf6fa6b551ff33770a03"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2501.00006",
    "kind": "arxiv",
    "version": 1
  }
}