Pith Number

pith:75QL2GUX

pith:2017:75QL2GUXQPBWXNGGYCJIGTWQMS

not attested not anchored not stored refs pending

Iterative Methods for Photoacoustic Tomography in Attenuating Acoustic Media

Linh V. Nguyen, Markus Haltmeier, Richard Kowar

arxiv:1704.07422 v2 · 2017-04-24 · math.NA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{75QL2GUXQPBWXNGGYCJIGTWQMS}

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	2026-05-18T00:30:04.705420Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ff60bd1a9783c36bb4c6c092834ed064a4b0d8d2cf06a64bbbe648a70d0567bd

Aliases

arxiv: 1704.07422 · arxiv_version: 1704.07422v2 · doi: 10.48550/arxiv.1704.07422 · pith_short_12: 75QL2GUXQPBW · pith_short_16: 75QL2GUXQPBWXNGG · pith_short_8: 75QL2GUX

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/75QL2GUXQPBWXNGGYCJIGTWQMS \
  | 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: ff60bd1a9783c36bb4c6c092834ed064a4b0d8d2cf06a64bbbe648a70d0567bd

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7e4d78bf3be8a005828546b5e26519164d6818b1983d2be572cf23379267ca57",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2017-04-24T19:17:43Z",
    "title_canon_sha256": "55de99c776f29cc928d2c03ccd05b57aefd7dc230bc1bf1e77f0b971e017e4ab"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1704.07422",
    "kind": "arxiv",
    "version": 2
  }
}