Pith Number

pith:SX55OPLV

pith:2010:SX55OPLV4EZO4JRQTHBZ6WZHIH

not attested not anchored not stored refs pending

Some planar isospectral domains

John Conway, Klaus-Dieter Semmler, Peter Buser, Peter Doyle

arxiv:1005.1839 v1 · 2010-05-11 · math.DG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{SX55OPLV4EZO4JRQTHBZ6WZHIH}

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	2026-05-18T02:24:08.400326Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

95fbd73d75e132ee263099c39f5b2741e1a5cecc94a0e7e2c22df87ea0a3afe4

Aliases

arxiv: 1005.1839 · arxiv_version: 1005.1839v1 · doi: 10.48550/arxiv.1005.1839 · pith_short_12: SX55OPLV4EZO · pith_short_16: SX55OPLV4EZO4JRQ · pith_short_8: SX55OPLV

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/SX55OPLV4EZO4JRQTHBZ6WZHIH \
  | 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: 95fbd73d75e132ee263099c39f5b2741e1a5cecc94a0e7e2c22df87ea0a3afe4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "830fb84cb2e809451bf032bbd1296b12d7e3dd1b0b4fc0c97edc53d03eab3f28",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DG",
    "submitted_at": "2010-05-11T14:14:08Z",
    "title_canon_sha256": "e247d8dd51daf9749eda7afcf0e278cff147f4d9d06da0df48be5782bf8449f8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1005.1839",
    "kind": "arxiv",
    "version": 1
  }
}