Pith Number

pith:UUY2ORO7

pith:2017:UUY2ORO7VMDISUEHHULUWSYFMU

not attested not anchored not stored refs pending

Biologically-inspired characterization of sparseness in natural images

Laurent U Perrinet (INT)

arxiv:1702.02485 v1 · 2017-02-08 · q-bio.NC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{UUY2ORO7VMDISUEHHULUWSYFMU}

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	2026-05-18T00:51:05.837546Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a531a745dfab068950873d174b4b056514e1cffccf231d4f1d947cb72711d5dc

Aliases

arxiv: 1702.02485 · arxiv_version: 1702.02485v1 · doi: 10.48550/arxiv.1702.02485 · pith_short_12: UUY2ORO7VMDI · pith_short_16: UUY2ORO7VMDISUEH · pith_short_8: UUY2ORO7

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/UUY2ORO7VMDISUEHHULUWSYFMU \
  | 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: a531a745dfab068950873d174b4b056514e1cffccf231d4f1d947cb72711d5dc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c1c32690165de42b8bfd6c1c69cc1c11c012cbde7378d8b36880a667e946acc9",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "q-bio.NC",
    "submitted_at": "2017-02-08T15:57:57Z",
    "title_canon_sha256": "dccdbe52d58e29693700178af222affe71c5c4d5dbd327b44bd63c6ae5678315"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1702.02485",
    "kind": "arxiv",
    "version": 1
  }
}