Pith Number

pith:O34AHCVH

pith:2019:O34AHCVHJSDO4QAJUUXPCF4FE3

not attested not anchored not stored refs pending

3D Wave-Equation-Based Finite-Frequency Tomography for Ultrasound Computed Tomography

A. Fichtner (1) ((1) Institute of Geophysics, C. Boehm (1), ETH Zurich, N. Korta Martiartu (1), Switzerland), Zurich

arxiv:1908.03302 v1 · 2019-08-09 · physics.med-ph · eess.IV

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{O34AHCVHJSDO4QAJUUXPCF4FE3}

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	2026-07-04T23:52:38.543549Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

76f8038aa74c86ee4009a52ef1178526f4c49109ae56ddd34780eaeb74c3c7ec

Aliases

arxiv: 1908.03302 · arxiv_version: 1908.03302v1 · doi: 10.48550/arxiv.1908.03302 · pith_short_12: O34AHCVHJSDO · pith_short_16: O34AHCVHJSDO4QAJ · pith_short_8: O34AHCVH

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/O34AHCVHJSDO4QAJUUXPCF4FE3 \
  | 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: 76f8038aa74c86ee4009a52ef1178526f4c49109ae56ddd34780eaeb74c3c7ec

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "93f9fc976e26d19809f12469e2c3704ef362ad423017883f68058c22c16466af",
    "cross_cats_sorted": [
      "eess.IV"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.med-ph",
    "submitted_at": "2019-08-09T04:09:27Z",
    "title_canon_sha256": "bf7cd9e6f3fefc3af05c601fd10b41247827d014e8b2968f4ce23e9f2e20917c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1908.03302",
    "kind": "arxiv",
    "version": 1
  }
}