Pith Number

pith:PTERCQNX

pith:2011:PTERCQNXAYZMJHHUUOU5D3JJ5R

not attested not anchored not stored refs pending

Gaussian Affine Feature Detector

Xiaochun Zhang, Xiaopeng Xu

arxiv:1104.1472 v1 · 2011-04-08 · 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{PTERCQNXAYZMJHHUUOU5D3JJ5R}

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	2026-05-18T02:22:10.407035Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7cc91141b70632c49cf4a3a9d1ed29ec625b97acc1e5bd9ecc66520922d16bec

Aliases

arxiv: 1104.1472 · arxiv_version: 1104.1472v1 · doi: 10.48550/arxiv.1104.1472 · pith_short_12: PTERCQNXAYZM · pith_short_16: PTERCQNXAYZMJHHU · pith_short_8: PTERCQNX

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/PTERCQNXAYZMJHHUUOU5D3JJ5R \
  | 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: 7cc91141b70632c49cf4a3a9d1ed29ec625b97acc1e5bd9ecc66520922d16bec

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ca9be50453974982f81ce31a5a91f0c07d4ca56edf1c59c39c9b367e39714d08",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2011-04-08T03:15:43Z",
    "title_canon_sha256": "2f4eedcccda597bdc417e75e7d58d72131facee8e88448626e9bdb82cec333ad"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1104.1472",
    "kind": "arxiv",
    "version": 1
  }
}