Pith Number

pith:CEYJGLHA

pith:2014:CEYJGLHAQVJ72YCPRLFTROD7BR

not attested not anchored not stored refs pending

Best $L_1$ approximation of Heaviside-type functions in Chebyshev and weak-Chebyshev spaces

Eric Nyiri, Laurent Gajny, Olivier Gibaru, Shu-Cherng Fang

arxiv:1407.0228 v3 · 2014-07-01 · math.FA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{CEYJGLHAQVJ72YCPRLFTROD7BR}

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	2026-05-18T01:29:21.782198Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1130932ce08553fd604f8acb38b87f0c4794ae582b40b81910c6132860b6339c

Aliases

arxiv: 1407.0228 · arxiv_version: 1407.0228v3 · doi: 10.48550/arxiv.1407.0228 · pith_short_12: CEYJGLHAQVJ7 · pith_short_16: CEYJGLHAQVJ72YCP · pith_short_8: CEYJGLHA

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/CEYJGLHAQVJ72YCPRLFTROD7BR \
  | 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: 1130932ce08553fd604f8acb38b87f0c4794ae582b40b81910c6132860b6339c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c4a1ef09df834310a1ec287319dea01129c9910dda8d63ddc05344bb4527c592",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.FA",
    "submitted_at": "2014-07-01T13:20:34Z",
    "title_canon_sha256": "209c85d996f6b2820d8059f68053ff03e80a017639e4b9819c9ba875a8c3e5dd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1407.0228",
    "kind": "arxiv",
    "version": 3
  }
}