Pith Number

pith:O7IK3NL3

pith:2019:O7IK3NL37QJNPSWSN4YYNBCGKF

not attested not anchored not stored refs pending

Construction of conformal maps based on the locations of singularities for improving the double exponential formula

Ken'ichiro Tanaka, Shunki Kyoya

arxiv:1904.05989 v1 · 2019-04-12 · cs.NA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{O7IK3NL37QJNPSWSN4YYNBCGKF}

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	2026-05-17T23:48:44.570924Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

77d0adb57bfc12d7cad26f31868446516b0d235cae58d858a00995d6a52f85a8

Aliases

arxiv: 1904.05989 · arxiv_version: 1904.05989v1 · doi: 10.48550/arxiv.1904.05989 · pith_short_12: O7IK3NL37QJN · pith_short_16: O7IK3NL37QJNPSWS · pith_short_8: O7IK3NL3

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/O7IK3NL37QJNPSWSN4YYNBCGKF \
  | 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: 77d0adb57bfc12d7cad26f31868446516b0d235cae58d858a00995d6a52f85a8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7f013f7e1c34a09af21f9dff82c4c938678d3dcf68ba7f1cbf9ea65e4d4413e8",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.NA",
    "submitted_at": "2019-04-12T00:17:31Z",
    "title_canon_sha256": "91a2f0038aa723a48f3ea7ac9db3f9f4a338aac4a5e7dd3c9d8af1a3bb6e0bf1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1904.05989",
    "kind": "arxiv",
    "version": 1
  }
}