Pith Number

pith:U4K7UUR3

pith:2021:U4K7UUR356WNJOVYMHHFABWWH3

not attested not anchored not stored refs pending

Unsupervised Multi-Index Semantic Hashing

Casper Hansen, Christian Hansen, Christina Lioma, Jakob Grue Simonsen, Stephen Alstrup

arxiv:2103.14460 v1 · 2021-03-26 · cs.IR · cs.LG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{U4K7UUR356WNJOVYMHHFABWWH3}

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	2026-07-05T02:26:41.179931Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a715fa523befacd4bab861ce5006d63ef3e5825a850fc992508d9e7954c5e7ac

Aliases

arxiv: 2103.14460 · arxiv_version: 2103.14460v1 · doi: 10.48550/arxiv.2103.14460 · pith_short_12: U4K7UUR356WN · pith_short_16: U4K7UUR356WNJOVY · pith_short_8: U4K7UUR3

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/U4K7UUR356WNJOVYMHHFABWWH3 \
  | 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: a715fa523befacd4bab861ce5006d63ef3e5825a850fc992508d9e7954c5e7ac

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2be47bf71671504c1fb124c3597d84677abc6fd0caf15629cda86501b26fe69a",
    "cross_cats_sorted": [
      "cs.LG"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.IR",
    "submitted_at": "2021-03-26T13:33:48Z",
    "title_canon_sha256": "2d5adbf5b88b4674d652e443acee10a41319edf0bac41416fb2701ab0663cf31"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2103.14460",
    "kind": "arxiv",
    "version": 1
  }
}