Pith Number

pith:W42SF4L3

pith:2018:W42SF4L3ZRJQK3MUOGPVJWHZZN

not attested not anchored not stored refs pending

Optimal terminal dimensionality reduction in Euclidean space

Jelani Nelson, Shyam Narayanan

arxiv:1810.09250 v1 · 2018-10-22 · cs.DS · math.FA · stat.ML

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{W42SF4L3ZRJQK3MUOGPVJWHZZN}

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	2026-05-18T00:02:40.713270Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b73522f17bcc53056d94719f54d8f9cb7fe2e56dbbc03619895d13834176bde0

Aliases

arxiv: 1810.09250 · arxiv_version: 1810.09250v1 · doi: 10.48550/arxiv.1810.09250 · pith_short_12: W42SF4L3ZRJQ · pith_short_16: W42SF4L3ZRJQK3MU · pith_short_8: W42SF4L3

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/W42SF4L3ZRJQK3MUOGPVJWHZZN \
  | 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: b73522f17bcc53056d94719f54d8f9cb7fe2e56dbbc03619895d13834176bde0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0913be10b9fe49572bc8474c894432228b8755e88b1a649bd4c78103636e87b7",
    "cross_cats_sorted": [
      "math.FA",
      "stat.ML"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2018-10-22T13:22:38Z",
    "title_canon_sha256": "144cf62d5fa978d3bc8da4245b8fcd70fd82bab271c3a8a4c5f156cab95f2de6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1810.09250",
    "kind": "arxiv",
    "version": 1
  }
}