Pith Number

pith:PYVPDCPZ

pith:2015:PYVPDCPZTTYOQ3W5LYSGRDLLOK

not attested not anchored not stored refs pending

Analysis and approximation of some Shape-from-Shading models for non-Lambertian surfaces

Maurizio Falcone, Silvia Tozza

arxiv:1502.05197 v2 · 2015-02-18 · math.NA · cs.CV · cs.NA · math.AP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{PYVPDCPZTTYOQ3W5LYSGRDLLOK}

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	2026-05-18T01:21:49.240656Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7e2af189f99cf0e86edd5e24688d6b729e65f9e650bc604e513c211994b1c068

Aliases

arxiv: 1502.05197 · arxiv_version: 1502.05197v2 · doi: 10.48550/arxiv.1502.05197 · pith_short_12: PYVPDCPZTTYO · pith_short_16: PYVPDCPZTTYOQ3W5 · pith_short_8: PYVPDCPZ

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/PYVPDCPZTTYOQ3W5LYSGRDLLOK \
  | 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: 7e2af189f99cf0e86edd5e24688d6b729e65f9e650bc604e513c211994b1c068

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a72a1dcb23c3deb1f6e3f69a60f3542d453bcdda61a4c643be5c304544a05533",
    "cross_cats_sorted": [
      "cs.CV",
      "cs.NA",
      "math.AP"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2015-02-18T12:24:41Z",
    "title_canon_sha256": "27f36186d752d65013f5da680873289cee38b6fbb61d59c2eedaae87fdeeacbb"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1502.05197",
    "kind": "arxiv",
    "version": 2
  }
}