Pith Number

pith:ORQQU7E4

pith:2015:ORQQU7E4PDUIPZIRHRWO2IFM5K

not attested not anchored not stored refs pending

Reflectance Hashing for Material Recognition

Hang Zhang, Ko Nishino, Kristin Dana

arxiv:1502.02092 v1 · 2015-02-07 · 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{ORQQU7E4PDUIPZIRHRWO2IFM5K}

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	2026-05-18T02:27:49.990965Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

74610a7c9c78e887e5113c6ced20acea982cb79faf592fb48fb5fac780a30bb7

Aliases

arxiv: 1502.02092 · arxiv_version: 1502.02092v1 · doi: 10.48550/arxiv.1502.02092 · pith_short_12: ORQQU7E4PDUI · pith_short_16: ORQQU7E4PDUIPZIR · pith_short_8: ORQQU7E4

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/ORQQU7E4PDUIPZIRHRWO2IFM5K \
  | 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: 74610a7c9c78e887e5113c6ced20acea982cb79faf592fb48fb5fac780a30bb7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "204d8b8d410fed32c506b702017adc194a7feaebe6379bb2d6fe1200e916db2a",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2015-02-07T03:29:10Z",
    "title_canon_sha256": "1da691abd74f4f2f404f16f50b29bbb3bfb6b109266ed9bb4b5cc7e002ed631c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1502.02092",
    "kind": "arxiv",
    "version": 1
  }
}