Pith Number

pith:WFKKSPHA

pith:2017:WFKKSPHALBCF4REUBRSHSUQKC2

not attested not anchored not stored refs pending

A vertex-weighted-Least-Squares gradient reconstruction

Fan Zhang

arxiv:1702.04518 v1 · 2017-02-15 · physics.flu-dyn

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{WFKKSPHALBCF4REUBRSHSUQKC2}

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	2026-05-18T00:50:41.424992Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b154a93ce058445e44940c6479520a16b234a56b85517dba8e1adee928ebecac

Aliases

arxiv: 1702.04518 · arxiv_version: 1702.04518v1 · doi: 10.48550/arxiv.1702.04518 · pith_short_12: WFKKSPHALBCF · pith_short_16: WFKKSPHALBCF4REU · pith_short_8: WFKKSPHA

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/WFKKSPHALBCF4REUBRSHSUQKC2 \
  | 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: b154a93ce058445e44940c6479520a16b234a56b85517dba8e1adee928ebecac

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "48ec20bafa436967d49c5205324a0a49813b4d9b763930b931ed75f77af9aba4",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.flu-dyn",
    "submitted_at": "2017-02-15T09:42:54Z",
    "title_canon_sha256": "e252a15d78353f7d9ec7f93b64c4fe531cfe2d1c8d71deb255befdafe4331d74"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1702.04518",
    "kind": "arxiv",
    "version": 1
  }
}