Pith Number

pith:OK4IEDHZ

pith:2020:OK4IEDHZNBWSDDDC6PT2AGFCHK

not attested not anchored not stored refs pending

The Sparse Hausdorff Moment Problem, with Application to Topic Models

Bijan Mazaheri, Leonard J. Schulman, Spencer Gordon, Yuval Rabani

arxiv:2007.08101 v3 · 2020-07-16 · cs.LG · cs.DS · 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{OK4IEDHZNBWSDDDC6PT2AGFCHK}

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	2026-07-05T01:33:21.919734Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

72b8820cf9686d218c62f3e7a018a23aa127b0ae296fbd3ed7af3d3f89c0ce3c

Aliases

arxiv: 2007.08101 · arxiv_version: 2007.08101v3 · doi: 10.48550/arxiv.2007.08101 · pith_short_12: OK4IEDHZNBWS · pith_short_16: OK4IEDHZNBWSDDDC · pith_short_8: OK4IEDHZ

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/OK4IEDHZNBWSDDDC6PT2AGFCHK \
  | 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: 72b8820cf9686d218c62f3e7a018a23aa127b0ae296fbd3ed7af3d3f89c0ce3c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4645921d647370654586de871f25d1a2101e311535ec951e465c419448024233",
    "cross_cats_sorted": [
      "cs.DS",
      "stat.ML"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2020-07-16T04:23:57Z",
    "title_canon_sha256": "f2c00e1f4945a3e1c4e95d800a0f9dfe67139e7d82ae8a9a7f98d05b47fa2fbc"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2007.08101",
    "kind": "arxiv",
    "version": 3
  }
}