Pith Number

pith:NKHNPHRR

pith:2018:NKHNPHRR7FZKUIT2GGYCFFFIQD

not attested not anchored not stored refs pending

Ladder system uniformization on trees I & II

D\'aniel T. Soukup

arxiv:1806.03867 v2 · 2018-06-11 · 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{NKHNPHRR7FZKUIT2GGYCFFFIQD}

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	2026-05-17T23:56:58.428892Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6a8ed79e31f972aa227a31b02294a880f4f02d471fa4824635386d414dd41d29

Aliases

arxiv: 1806.03867 · arxiv_version: 1806.03867v2 · doi: 10.48550/arxiv.1806.03867 · pith_short_12: NKHNPHRR7FZK · pith_short_16: NKHNPHRR7FZKUIT2 · pith_short_8: NKHNPHRR

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/NKHNPHRR7FZKUIT2GGYCFFFIQD \
  | 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: 6a8ed79e31f972aa227a31b02294a880f4f02d471fa4824635386d414dd41d29

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "fa6de2233aa9aa1c76b574f5f6cd3a8f18eb25c3adcf07a3f5da1ee0809f541c",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.LO",
    "submitted_at": "2018-06-11T09:10:00Z",
    "title_canon_sha256": "5dfb006c71d58842791083c0a5a9a18a33be2cb396332f4c70d5ae7968b0a6ea"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1806.03867",
    "kind": "arxiv",
    "version": 2
  }
}