Pith Number

pith:UV7BFKXN

pith:2017:UV7BFKXNO2FRKEESLIGTEXF6W5

not attested not anchored not stored refs pending

Function approximation on arbitrary domains using Fourier extension frames

Daan Huybrechs, Roel Matthysen

arxiv:1706.04848 v1 · 2017-06-15 · 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{UV7BFKXNO2FRKEESLIGTEXF6W5}

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	2026-05-18T00:42:19.060916Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a57e12aaed768b1510925a0d325cbeb750eeeb52923d993c10c2bba577a48a3d

Aliases

arxiv: 1706.04848 · arxiv_version: 1706.04848v1 · doi: 10.48550/arxiv.1706.04848 · pith_short_12: UV7BFKXNO2FR · pith_short_16: UV7BFKXNO2FRKEES · pith_short_8: UV7BFKXN

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/UV7BFKXNO2FRKEESLIGTEXF6W5 \
  | 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: a57e12aaed768b1510925a0d325cbeb750eeeb52923d993c10c2bba577a48a3d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "aec6af6d42a54d793eb674c24f869c27b693ee06cc46fabe56be1a7453694c14",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2017-06-15T12:52:01Z",
    "title_canon_sha256": "e019440f1118dacee7bc6d21d9c04a53dab50fb9aead1676efcdef27fd28469e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1706.04848",
    "kind": "arxiv",
    "version": 1
  }
}