Pith Number

pith:Q3M3JN3O

pith:2017:Q3M3JN3O4BMYPALKHMLX4BUBGZ

not attested not anchored not stored refs pending

How hard can it be? Estimating the difficulty of visual search in an image

Bogdan Alexe, Dim P. Papadopoulos, Marius Leordeanu, Marius Popescu, Radu Tudor Ionescu, Vittorio Ferrari

arxiv:1705.08280 v1 · 2017-05-23 · cs.CV

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{Q3M3JN3O4BMYPALKHMLX4BUBGZ}

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	2026-05-18T00:43:48.790933Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

86d9b4b76ee05987816a3b177e0681367ec331d2cce2cb5d6070dd4304fb940b

Aliases

arxiv: 1705.08280 · arxiv_version: 1705.08280v1 · doi: 10.48550/arxiv.1705.08280 · pith_short_12: Q3M3JN3O4BMY · pith_short_16: Q3M3JN3O4BMYPALK · pith_short_8: Q3M3JN3O

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/Q3M3JN3O4BMYPALKHMLX4BUBGZ \
  | 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: 86d9b4b76ee05987816a3b177e0681367ec331d2cce2cb5d6070dd4304fb940b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5798a13f53a096d61c85d6f6b77eab71f5127bc2f75aaab631a8328004738196",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2017-05-23T14:03:20Z",
    "title_canon_sha256": "3c96f1522c4e7f007077420fe5627d22fb8b4a86ccda8a513f77be113b97473e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1705.08280",
    "kind": "arxiv",
    "version": 1
  }
}