Pith Number

pith:2CG35OLY

pith:2015:2CG35OLYT3NY5A5XY3UZ43W4WK

not attested not anchored not stored refs pending

Ramsey Algebra and the Existence of Idempotent Ultrafilters

Wen Chean Teh

arxiv:1501.07353 v1 · 2015-01-29 · 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{2CG35OLYT3NY5A5XY3UZ43W4WK}

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	2026-05-18T01:09:59.881927Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d08dbeb9789edb8e83b7c6e99e6edcb2942babe8432e1d2cc0fa170144c61adf

Aliases

arxiv: 1501.07353 · arxiv_version: 1501.07353v1 · doi: 10.48550/arxiv.1501.07353 · pith_short_12: 2CG35OLYT3NY · pith_short_16: 2CG35OLYT3NY5A5X · pith_short_8: 2CG35OLY

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/2CG35OLYT3NY5A5XY3UZ43W4WK \
  | 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: d08dbeb9789edb8e83b7c6e99e6edcb2942babe8432e1d2cc0fa170144c61adf

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "32559476a53fc87cb5eb61e0a4889976a636a4ae088bb194f7c23cff57baa12e",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.LO",
    "submitted_at": "2015-01-29T06:34:35Z",
    "title_canon_sha256": "76e9059e9d0ab701c2b0f61c4f5fb1d788be73aeb843838a568b0b43efc85cca"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1501.07353",
    "kind": "arxiv",
    "version": 1
  }
}