Pith Number

pith:UPCOZ3RZ

pith:2021:UPCOZ3RZYLKOKN3WYWVKR2HRU2

not attested not anchored not stored refs pending

Representation Learning for Efficient and Effective Similarity Search and Recommendation

Casper Hansen

arxiv:2109.01815 v1 · 2021-09-04 · cs.IR · cs.AI · cs.CL · 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{UPCOZ3RZYLKOKN3WYWVKR2HRU2}

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	2026-07-05T03:11:35.398708Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a3c4ecee39c2d4e53776c5aaa8e8f1a6b141c10651c5c0663e62c1d5219895f8

Aliases

arxiv: 2109.01815 · arxiv_version: 2109.01815v1 · doi: 10.48550/arxiv.2109.01815 · pith_short_12: UPCOZ3RZYLKO · pith_short_16: UPCOZ3RZYLKOKN3W · pith_short_8: UPCOZ3RZ

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/UPCOZ3RZYLKOKN3WYWVKR2HRU2 \
  | 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: a3c4ecee39c2d4e53776c5aaa8e8f1a6b141c10651c5c0663e62c1d5219895f8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "968751488bb75ac27bc1ed0059dfd88ca12a1b9053a7343e66e330a2bb7d64ba",
    "cross_cats_sorted": [
      "cs.AI",
      "cs.CL",
      "cs.LG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IR",
    "submitted_at": "2021-09-04T08:19:01Z",
    "title_canon_sha256": "abc0cb60c4e37e286ae164cb9e955fb127aac9ee2cd4e55fd770a2beb66fc230"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2109.01815",
    "kind": "arxiv",
    "version": 1
  }
}