Pith Number

pith:L7UAUGE2

pith:2017:L7UAUGE2735E4ZVTKUUIZDWPSF

not attested not anchored not stored refs pending

The Rice-Shapiro theorem in Computable Topology

Margarita Korovina, Oleg Kudinov

arxiv:1708.09820 v4 · 2017-08-31 · cs.LO · 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{L7UAUGE2735E4ZVTKUUIZDWPSF}

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	2026-05-17T23:51:21.520066Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5fe80a189afefa4e66b355288c8ecf917a19255324c2af42e370f480486c90f2

Aliases

arxiv: 1708.09820 · arxiv_version: 1708.09820v4 · doi: 10.48550/arxiv.1708.09820 · pith_short_12: L7UAUGE2735E · pith_short_16: L7UAUGE2735E4ZVT · pith_short_8: L7UAUGE2

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/L7UAUGE2735E4ZVTKUUIZDWPSF \
  | 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: 5fe80a189afefa4e66b355288c8ecf917a19255324c2af42e370f480486c90f2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "402be713908a55908676026183e46e008d9924d872e1d817c5f96cd38f2fd5e1",
    "cross_cats_sorted": [
      "math.LO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LO",
    "submitted_at": "2017-08-31T17:02:42Z",
    "title_canon_sha256": "90d0c6c2419bcda140ba371e03b613969425afd622e06970d70268d1302d9609"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1708.09820",
    "kind": "arxiv",
    "version": 4
  }
}