Pith Number

pith:RRIHYT2B

pith:2011:RRIHYT2BMQXTKUHWNTKVJOEIWE

not attested not anchored not stored refs pending

On surjectively universal Polish groups

Longyun Ding

arxiv:1109.2283 v1 · 2011-09-11 · 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{RRIHYT2BMQXTKUHWNTKVJOEIWE}

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	2026-05-18T04:13:38.106225Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8c507c4f41642f3550f66cd554b888b11f34e3f152052fba88c47b411cdabd1e

Aliases

arxiv: 1109.2283 · arxiv_version: 1109.2283v1 · doi: 10.48550/arxiv.1109.2283 · pith_short_12: RRIHYT2BMQXT · pith_short_16: RRIHYT2BMQXTKUHW · pith_short_8: RRIHYT2B

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/RRIHYT2BMQXTKUHWNTKVJOEIWE \
  | 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: 8c507c4f41642f3550f66cd554b888b11f34e3f152052fba88c47b411cdabd1e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ad93db1d3a0573281608e4c0b5629adec39cb26cd442f43adabaa288b8738866",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.LO",
    "submitted_at": "2011-09-11T05:48:50Z",
    "title_canon_sha256": "6d89cb8c653cbb689eeceb845d461d9c727b3f1571d0fb5245690ae4b02b7001"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1109.2283",
    "kind": "arxiv",
    "version": 1
  }
}