Pith Number

pith:FHNOCPQ2

pith:2014:FHNOCPQ2VUQN4QWUCXT2OQJTW5

not attested not anchored not stored refs pending

Lower bounds for the approximation with variation-diminishing splines

Brigitte Forster, Johannes Nagler, Paula Cerejeiras

arxiv:1402.2403 v1 · 2014-02-11 · math.CA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{FHNOCPQ2VUQN4QWUCXT2OQJTW5}

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	2026-05-18T02:59:19.951107Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

29dae13e1aad20de42d415e7a74133b7495e9f741d48795941ef3ddf0cabd95b

Aliases

arxiv: 1402.2403 · arxiv_version: 1402.2403v1 · doi: 10.48550/arxiv.1402.2403 · pith_short_12: FHNOCPQ2VUQN · pith_short_16: FHNOCPQ2VUQN4QWU · pith_short_8: FHNOCPQ2

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/FHNOCPQ2VUQN4QWUCXT2OQJTW5 \
  | 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: 29dae13e1aad20de42d415e7a74133b7495e9f741d48795941ef3ddf0cabd95b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "65efc939642a5133f78fcf7cfccf6f92477f296d00cff0a385880664cc47322f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CA",
    "submitted_at": "2014-02-11T08:56:16Z",
    "title_canon_sha256": "5f7561def5c90f9e5cf7aa8125779f001c352b9321c691ad41533805bf51e46b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1402.2403",
    "kind": "arxiv",
    "version": 1
  }
}