Pith Number

pith:WJULMBDZ

pith:2021:WJULMBDZN5IBTV5JGOTWYGPC4T

not attested not anchored not stored refs pending

Derivative Extrapolation Using Least Squares

Armen Davis, Boris Shapoval, Ian Faber, Jake McGrath, Nick Butler, Peter Borrell

arxiv:2110.02167 v1 · 2021-09-27 · eess.SP · cs.NA · 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{WJULMBDZN5IBTV5JGOTWYGPC4T}

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	2026-07-05T03:20:16.503680Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b268b604796f5019d7a933a76c19e2e4f84435edc78dfd25ea28a6b878c6140d

Aliases

arxiv: 2110.02167 · arxiv_version: 2110.02167v1 · doi: 10.48550/arxiv.2110.02167 · pith_short_12: WJULMBDZN5IB · pith_short_16: WJULMBDZN5IBTV5J · pith_short_8: WJULMBDZ

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/WJULMBDZN5IBTV5JGOTWYGPC4T \
  | 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: b268b604796f5019d7a933a76c19e2e4f84435edc78dfd25ea28a6b878c6140d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a9b97058244d1a0e4ac832629d441bf5e7b91c7b55b7038ea04cd5281040a833",
    "cross_cats_sorted": [
      "cs.NA",
      "math.NA"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "eess.SP",
    "submitted_at": "2021-09-27T02:26:31Z",
    "title_canon_sha256": "a1ab89b9c6c0fcc7ee167c2d79cf3ab799649374a8ce855e67c61197b4535b75"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2110.02167",
    "kind": "arxiv",
    "version": 1
  }
}