Pith Number

pith:SZP6PSTK

pith:2015:SZP6PSTKKUZCA6LLTGZBYPQLDF

not attested not anchored not stored refs pending

Linear least squares problems involving fixed knots polynomial splines and their singularity study

Nadezda Sukhorukova, Zahra Roshan Zamir

arxiv:1503.01176 v1 · 2015-03-04 · math.OC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{SZP6PSTKKUZCA6LLTGZBYPQLDF}

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	2026-05-18T02:25:39.698023Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

965fe7ca6a553220796b99b21c3e0b19782981bd20ae3e77312a1147141b98ea

Aliases

arxiv: 1503.01176 · arxiv_version: 1503.01176v1 · doi: 10.48550/arxiv.1503.01176 · pith_short_12: SZP6PSTKKUZC · pith_short_16: SZP6PSTKKUZCA6LL · pith_short_8: SZP6PSTK

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/SZP6PSTKKUZCA6LLTGZBYPQLDF \
  | 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: 965fe7ca6a553220796b99b21c3e0b19782981bd20ae3e77312a1147141b98ea

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8a0e962658a5dd8e432d9e86131ad16b10e9e171d05d095e3cbed71416fc0f0a",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2015-03-04T00:46:50Z",
    "title_canon_sha256": "f8c4c13e9c5d20454836df1e7069021aa2a06e494de60220a852e22b006d82f7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1503.01176",
    "kind": "arxiv",
    "version": 1
  }
}