Pith Number

pith:O7LPX7DA

pith:2017:O7LPX7DAGIZI5ONAGDCLAIRPBH

not attested not anchored not stored refs pending

Notes on Cofinality Spectrum Problems

David Casey, Maryanthe Malliaris

arxiv:1709.02408 v1 · 2017-09-07 · 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{O7LPX7DAGIZI5ONAGDCLAIRPBH}

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	2026-05-18T00:35:45.929256Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

77d6fbfc6032328eb9a030c4b0222f09f85042d94a023b64701576ea8db8ee09

Aliases

arxiv: 1709.02408 · arxiv_version: 1709.02408v1 · doi: 10.48550/arxiv.1709.02408 · pith_short_12: O7LPX7DAGIZI · pith_short_16: O7LPX7DAGIZI5ONA · pith_short_8: O7LPX7DA

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/O7LPX7DAGIZI5ONAGDCLAIRPBH \
  | 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: 77d6fbfc6032328eb9a030c4b0222f09f85042d94a023b64701576ea8db8ee09

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5dbc02260ff6356aa126dde14bc232ee47cbbc29fa1a501c207a6013f4bbc5e2",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.LO",
    "submitted_at": "2017-09-07T18:52:26Z",
    "title_canon_sha256": "6fe4fe469918099a8ffd6e9749d99be7bafc07ce732363697122182b029a1977"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1709.02408",
    "kind": "arxiv",
    "version": 1
  }
}