Pith Number

pith:4QIWGP6G

pith:2014:4QIWGP6GZSQOLXMVWBWVU2NOWA

not attested not anchored not stored refs pending

Adjusted least squares fitting of algebraic hypersurfaces

Ivan Markovsky, Konstantin Usevich

arxiv:1412.2291 v2 · 2014-12-06 · stat.CO · cs.CG · cs.CV · 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{4QIWGP6GZSQOLXMVWBWVU2NOWA}

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	2026-05-18T01:35:00.842040Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e411633fc6cca0e5dd95b06d5a69aeb0355193a3721d6c2a6eba80d68ba50191

Aliases

arxiv: 1412.2291 · arxiv_version: 1412.2291v2 · doi: 10.48550/arxiv.1412.2291 · pith_short_12: 4QIWGP6GZSQO · pith_short_16: 4QIWGP6GZSQOLXMV · pith_short_8: 4QIWGP6G

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/4QIWGP6GZSQOLXMVWBWVU2NOWA \
  | 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: e411633fc6cca0e5dd95b06d5a69aeb0355193a3721d6c2a6eba80d68ba50191

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "28f534c86028f6e26168e2defd7360a91fa61dbd0cb99870eb73f3a340da31e5",
    "cross_cats_sorted": [
      "cs.CG",
      "cs.CV",
      "math.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "stat.CO",
    "submitted_at": "2014-12-06T22:22:33Z",
    "title_canon_sha256": "ff839d3929fc13777a10dd1b814218305adb1ad1ad2eb99183d46e69979d4a37"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1412.2291",
    "kind": "arxiv",
    "version": 2
  }
}