Pith Number

pith:Y5GXQFQ3

pith:2012:Y5GXQFQ3D4H32BZD67N3KDDMZ3

not attested not anchored not stored refs pending

Defocusing microscopy with an arbitrary size for the aperture of the objective lens

C. Saavedra, G. Lima, Ivan F. Santos, S. Etcheverry, S. P\'adua, W. A. T. Nogueira

arxiv:1201.0649 v1 · 2012-01-03 · physics.optics

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{Y5GXQFQ3D4H32BZD67N3KDDMZ3}

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	2026-05-18T04:05:16.978860Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c74d78161b1f0fbd0723f7dbb50c6ccee83ca9bc91a5c13592a1fd50c8c1d9c5

Aliases

arxiv: 1201.0649 · arxiv_version: 1201.0649v1 · doi: 10.48550/arxiv.1201.0649 · pith_short_12: Y5GXQFQ3D4H3 · pith_short_16: Y5GXQFQ3D4H32BZD · pith_short_8: Y5GXQFQ3

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/Y5GXQFQ3D4H32BZD67N3KDDMZ3 \
  | 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: c74d78161b1f0fbd0723f7dbb50c6ccee83ca9bc91a5c13592a1fd50c8c1d9c5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8c6750b1771ed8022bcf2226ffe324a6e642d04eac9fe6d8c260bca2c08f876b",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.optics",
    "submitted_at": "2012-01-03T14:53:41Z",
    "title_canon_sha256": "508b65325d4a58e9eb320289dc761ab100c00a43d69b16b76b5d559f05abf5b8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1201.0649",
    "kind": "arxiv",
    "version": 1
  }
}