Pith Number

pith:JRH6BIRD

pith:2015:JRH6BIRDB6WYKIG5FX7672BVDT

not attested not anchored not stored refs pending

Tractability of Multivariate Approximation Defined over Hilbert Spaces with Exponential Weights

Christian Irrgeher, Friedrich Pillichshammer, Henryk Wozniakowski, Peter Kritzer

arxiv:1502.03286 v2 · 2015-02-11 · 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{JRH6BIRDB6WYKIG5FX7672BVDT}

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	2026-05-18T01:38:53.883412Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4c4fe0a2230fad8520dd2dffefe8351cc18b369709f05d5bb578ecbc58b87e57

Aliases

arxiv: 1502.03286 · arxiv_version: 1502.03286v2 · doi: 10.48550/arxiv.1502.03286 · pith_short_12: JRH6BIRDB6WY · pith_short_16: JRH6BIRDB6WYKIG5 · pith_short_8: JRH6BIRD

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/JRH6BIRDB6WYKIG5FX7672BVDT \
  | 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: 4c4fe0a2230fad8520dd2dffefe8351cc18b369709f05d5bb578ecbc58b87e57

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3ed5988d58286fd16b8d49bad5a409b8c316a6633f384c0cbed9601c3437197c",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2015-02-11T12:50:33Z",
    "title_canon_sha256": "a81a81e869b5d4ea95c74820ae0a8b458ed275e60fbc1c4dffe60e286f65f9bc"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1502.03286",
    "kind": "arxiv",
    "version": 2
  }
}