Pith Number

pith:Y4EPMXBN

pith:2016:Y4EPMXBNXDLDRROEWFDAN6SWEN

not attested not anchored not stored refs pending

Trees and gaps from a construction scheme

Fulgencio Lopez, Stevo Todorcevic

arxiv:1602.01518 v2 · 2016-02-04 · 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{Y4EPMXBNXDLDRROEWFDAN6SWEN}

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	2026-05-18T01:09:06.756260Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c708f65c2db8d638c5c4b14606fa562360356bcd80167481c53f0bce3c221edc

Aliases

arxiv: 1602.01518 · arxiv_version: 1602.01518v2 · doi: 10.48550/arxiv.1602.01518 · pith_short_12: Y4EPMXBNXDLD · pith_short_16: Y4EPMXBNXDLDRROE · pith_short_8: Y4EPMXBN

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/Y4EPMXBNXDLDRROEWFDAN6SWEN \
  | 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: c708f65c2db8d638c5c4b14606fa562360356bcd80167481c53f0bce3c221edc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f9e9107eebd01c1c6cbe008731c564fc4cb8f4f359d08c246589e3a81f127338",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.LO",
    "submitted_at": "2016-02-04T01:00:11Z",
    "title_canon_sha256": "c833ab5869165574d156a9819324d70c9c98b3977a3ceca8bb152957d4d499e4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1602.01518",
    "kind": "arxiv",
    "version": 2
  }
}