Pith Number

pith:XJ3UHNMP

pith:2018:XJ3UHNMPPASTESG2KD5A4TADON

not attested not anchored not stored refs pending

Gradient Descent-based D-optimal Design for the Least-Squares Polynomial Approximation

G. V. Ryzhakov, I. V. Oseledets, V. P. Zankin

arxiv:1806.06631 v2 · 2018-06-18 · cs.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{XJ3UHNMPPASTESG2KD5A4TADON}

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	2026-05-18T00:04:22.810633Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ba7743b58f78253248da50fa0e4c03735e96f124b022cc4afdbcfbdd0853a1aa

Aliases

arxiv: 1806.06631 · arxiv_version: 1806.06631v2 · doi: 10.48550/arxiv.1806.06631 · pith_short_12: XJ3UHNMPPAST · pith_short_16: XJ3UHNMPPASTESG2 · pith_short_8: XJ3UHNMP

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/XJ3UHNMPPASTESG2KD5A4TADON \
  | 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: ba7743b58f78253248da50fa0e4c03735e96f124b022cc4afdbcfbdd0853a1aa

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0007dd54841776cbbd5201e821c116d98b1eab74f053b4a3588d26acaa257098",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.NA",
    "submitted_at": "2018-06-18T12:47:27Z",
    "title_canon_sha256": "465d03ca2e346a9cc16b46b6bbfe845a53da41dc736b020d7dd1e6960f471ade"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1806.06631",
    "kind": "arxiv",
    "version": 2
  }
}