Pith Number

pith:I2L7BIER

pith:2015:I2L7BIERQIWRZLDFXHXVSRPDXB

not attested not anchored not stored refs pending

A Learning Approach to Optical Tomography

Alexandre Goy, Cedric Vonesch, Demetri Psaltis, Ioannis N. Papadopoulos, Michael Unser, Morteza H. Shoreh, Ulugbek S. Kamilov

arxiv:1502.01914 v1 · 2015-02-05 · 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{I2L7BIERQIWRZLDFXHXVSRPDXB}

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	2026-05-18T02:27:50.453828Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4697f0a091822d1cac65b9ef5945e3b843051410e17059d6aff4341e31a9a2dc

Aliases

arxiv: 1502.01914 · arxiv_version: 1502.01914v1 · doi: 10.48550/arxiv.1502.01914 · pith_short_12: I2L7BIERQIWR · pith_short_16: I2L7BIERQIWRZLDF · pith_short_8: I2L7BIER

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/I2L7BIERQIWRZLDFXHXVSRPDXB \
  | 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: 4697f0a091822d1cac65b9ef5945e3b843051410e17059d6aff4341e31a9a2dc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "026c26b398a999a3ec0efb4585cf09d7d1e2da7eca0d562c54bbf50570929964",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.optics",
    "submitted_at": "2015-02-05T18:06:57Z",
    "title_canon_sha256": "a11237c3cebd07bc29a02799cbc77dec7f05bae6d8196977d5de9d9d97651bdf"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1502.01914",
    "kind": "arxiv",
    "version": 1
  }
}