Pith Number

pith:IEEGIECP

pith:2019:IEEGIECPFILFOPQJY66LYW74HE

not attested not anchored not stored refs pending

Quadcubic interpolation: a four-dimensional spline method

Paul A. Walker

arxiv:1904.09869 v1 · 2019-04-18 · math.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{IEEGIECPFILFOPQJY66LYW74HE}

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	2026-05-17T23:48:03.015950Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

410864104f2a16573e09c7bcbc5bfc390f463b015d5290da0888f0e854edd0e8

Aliases

arxiv: 1904.09869 · arxiv_version: 1904.09869v1 · doi: 10.48550/arxiv.1904.09869 · pith_short_12: IEEGIECPFILF · pith_short_16: IEEGIECPFILFOPQJ · pith_short_8: IEEGIECP

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/IEEGIECPFILFOPQJY66LYW74HE \
  | 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: 410864104f2a16573e09c7bcbc5bfc390f463b015d5290da0888f0e854edd0e8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a9804557d343b71232030286dd51ede98e2e8e0f13ca076c55e0ef7dfe3b2d22",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2019-04-18T15:03:24Z",
    "title_canon_sha256": "296c60d016e4b4520ffbba180e8297149f0c5017dedaa5314a793beb2b2431a3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1904.09869",
    "kind": "arxiv",
    "version": 1
  }
}