Pith Number

pith:YYKS4L6C

pith:2019:YYKS4L6CGG4VEGRYCOPDOPMC5N

not attested not anchored not stored refs pending

Exploration of a Cosine Expansion Lattice Scheme

Cornelis W. Oosterlee, Ki Wai Chau

arxiv:1907.02758 v1 · 2019-07-05 · math.NA · 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{YYKS4L6CGG4VEGRYCOPDOPMC5N}

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	2026-05-17T23:41:23.247868Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c6152e2fc231b9521a38139e373d82eb67c0c0e7ce1f1fc3841eaa48ccb800e5

Aliases

arxiv: 1907.02758 · arxiv_version: 1907.02758v1 · doi: 10.48550/arxiv.1907.02758 · pith_short_12: YYKS4L6CGG4V · pith_short_16: YYKS4L6CGG4VEGRY · pith_short_8: YYKS4L6C

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/YYKS4L6CGG4VEGRYCOPDOPMC5N \
  | 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: c6152e2fc231b9521a38139e373d82eb67c0c0e7ce1f1fc3841eaa48ccb800e5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e8a398bd2a6409750f1a52508fd21fddb3b8d1521401faab09a188914b439548",
    "cross_cats_sorted": [
      "cs.NA"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2019-07-05T10:30:04Z",
    "title_canon_sha256": "53dc561876193f7dde7cfb7f43d5d2c9c4018e97b58c4a68bfefc528a5ba3b2c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1907.02758",
    "kind": "arxiv",
    "version": 1
  }
}