Pith Number

pith:3FNDGFWE

pith:2019:3FNDGFWEPWPQ7IRKIIXIZPHXVO

not attested not anchored not stored refs pending

Learning nonlinear level sets for dimensionality reduction in function approximation

Guannan Zhang, Jacob Hinkle, Jiaxin Zhang

arxiv:1902.10652 v3 · 2019-02-27 · 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{3FNDGFWEPWPQ7IRKIIXIZPHXVO}

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	2026-05-17T23:42:58.460344Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d95a3316c47d9f0fa22a422e8cbcf7aba7a7dcb90d8de10970ae0ea11e19cbae

Aliases

arxiv: 1902.10652 · arxiv_version: 1902.10652v3 · doi: 10.48550/arxiv.1902.10652 · pith_short_12: 3FNDGFWEPWPQ · pith_short_16: 3FNDGFWEPWPQ7IRK · pith_short_8: 3FNDGFWE

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/3FNDGFWEPWPQ7IRKIIXIZPHXVO \
  | 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: d95a3316c47d9f0fa22a422e8cbcf7aba7a7dcb90d8de10970ae0ea11e19cbae

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ca67c1c5e8868a86351c1db9c1daf2c7179718b6e031a58f12eee77b41ffa8a3",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.FA",
    "submitted_at": "2019-02-27T17:34:54Z",
    "title_canon_sha256": "a6727235939356c2e9e9225961bbab31c03699833e0bb527d38315d96aaa3e66"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1902.10652",
    "kind": "arxiv",
    "version": 3
  }
}