Pith Number

pith:WEQTXCDJ

pith:2015:WEQTXCDJHKQN6QE2CLRFDYGPDJ

not attested not anchored not stored refs pending

On the utility of Robinson-Amitsur ultrafilters. II

Pasha Zusmanovich

arxiv:1508.07496 v3 · 2015-08-29 · math.RA · 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{WEQTXCDJHKQN6QE2CLRFDYGPDJ}

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	2026-05-18T01:04:45.732076Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b1213b88693aa0df409a12e251e0cf1a56a478d6960993dd78f20c444825cf8d

Aliases

arxiv: 1508.07496 · arxiv_version: 1508.07496v3 · doi: 10.48550/arxiv.1508.07496 · pith_short_12: WEQTXCDJHKQN · pith_short_16: WEQTXCDJHKQN6QE2 · pith_short_8: WEQTXCDJ

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/WEQTXCDJHKQN6QE2CLRFDYGPDJ \
  | 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: b1213b88693aa0df409a12e251e0cf1a56a478d6960993dd78f20c444825cf8d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9495823962174c58973e3e031ca20489457dda77bc953061a4c54bbba5c299d1",
    "cross_cats_sorted": [
      "math.LO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.RA",
    "submitted_at": "2015-08-29T19:51:23Z",
    "title_canon_sha256": "15a9b18d3200a581a1bd97ecd0bfe8ccdc2a29e67bf15715bee99ed45c804d8f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1508.07496",
    "kind": "arxiv",
    "version": 3
  }
}