Pith Number

pith:SL73YFVZ

pith:1992:SL73YFVZIHKPB2FRXEJC7JDEL5

not attested not anchored not stored refs pending

Weak disks of Denjoy minimal sets

Philip Boyland

arxiv:math/9209220 v1 · 1992-09-01 · math.DS

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{SL73YFVZIHKPB2FRXEJC7JDEL5}

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	2026-05-18T01:05:52.631445Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

92ffbc16b941d4f0e8b1b9122fa4645f65c018e5a08706c8473192eaf35a4d99

Aliases

arxiv: math/9209220 · arxiv_version: math/9209220v1 · doi: 10.48550/arxiv.math/9209220 · pith_short_12: SL73YFVZIHKP · pith_short_16: SL73YFVZIHKPB2FR · pith_short_8: SL73YFVZ

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/SL73YFVZIHKPB2FRXEJC7JDEL5 \
  | 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: 92ffbc16b941d4f0e8b1b9122fa4645f65c018e5a08706c8473192eaf35a4d99

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8dc7f98c80298d9fcc794000ad43c867915bfcc2c4e2e52fdf5c5e0c8c9635fe",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "math.DS",
    "submitted_at": "1992-09-01T00:00:00Z",
    "title_canon_sha256": "1d46b45e279e9792796298f41eeaf165ae288ad014948076b0b79cc1d14ff1d3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "math/9209220",
    "kind": "arxiv",
    "version": 1
  }
}