Pith Number

pith:SA34DCFU

pith:2017:SA34DCFUGKSEE3JZGNPQC5T6QZ

not attested not anchored not stored refs pending

Positive constrained approximation via RBF-based partition of unity method

Alessandra De Rossi, Emma Perracchione

arxiv:1701.07260 v1 · 2017-01-25 · 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{SA34DCFUGKSEE3JZGNPQC5T6QZ}

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	2026-05-18T00:52:07.023556Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9037c188b432a4426d39335f01767e8666750a824a964f4cddc44ad729063637

Aliases

arxiv: 1701.07260 · arxiv_version: 1701.07260v1 · doi: 10.48550/arxiv.1701.07260 · pith_short_12: SA34DCFUGKSE · pith_short_16: SA34DCFUGKSEE3JZ · pith_short_8: SA34DCFU

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/SA34DCFUGKSEE3JZGNPQC5T6QZ \
  | 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: 9037c188b432a4426d39335f01767e8666750a824a964f4cddc44ad729063637

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ca311fbb07e551fcd7262a637ec5e152d2fe9004ba5c9f85abe4b268fc10406b",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2017-01-25T10:52:33Z",
    "title_canon_sha256": "72cf046d0b191c37a47044cc2a518da7ff965355e3033839607730ac2de55ebf"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1701.07260",
    "kind": "arxiv",
    "version": 1
  }
}