Pith Number

pith:BBW74MVQ

pith:2018:BBW74MVQ62V2Z7JKCPA4OWRNXA

not attested not anchored not stored refs pending

Reverse mathematics and colorings of hypergraphs

Caleb Davis, Jake Pardo, Jeffry Hirst, Timothy Ransom

arxiv:1804.09638 v2 · 2018-04-25 · 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{BBW74MVQ62V2Z7JKCPA4OWRNXA}

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	2026-05-18T00:00:02.149534Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

086dfe32b0f6abacfd2a13c1c75a2db8034b07e793ab3681e61bed2465d3e3de

Aliases

arxiv: 1804.09638 · arxiv_version: 1804.09638v2 · doi: 10.48550/arxiv.1804.09638 · pith_short_12: BBW74MVQ62V2 · pith_short_16: BBW74MVQ62V2Z7JK · pith_short_8: BBW74MVQ

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/BBW74MVQ62V2Z7JKCPA4OWRNXA \
  | 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: 086dfe32b0f6abacfd2a13c1c75a2db8034b07e793ab3681e61bed2465d3e3de

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6d4b52813462de86771d2d8cdec06a84f3f076f9a52ca32b1906442c90dea331",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.LO",
    "submitted_at": "2018-04-25T15:41:27Z",
    "title_canon_sha256": "fda0a47a36d9d0bb5aaad05b81819e60ce547455dc9921e25b27c49aa55bd2a5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1804.09638",
    "kind": "arxiv",
    "version": 2
  }
}