Pith Number

pith:277XE7SQ

pith:2015:277XE7SQQT5RZPEXMTRCPCRJJC

not attested not anchored not stored refs pending

A Direct Method for Photoacoustic Tomography with Inhomogeneous Sound Speed

Otmar Scherzer, Thomas Glatz, Zakaria Belhachmi

arxiv:1507.01741 v2 · 2015-07-07 · math.OC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{277XE7SQQT5RZPEXMTRCPCRJJC}

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	2026-05-18T01:19:00.398796Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d7ff727e5084fb1cbc9764e2278a294899f9ff1b24a99d73f9d596bba93383a5

Aliases

arxiv: 1507.01741 · arxiv_version: 1507.01741v2 · doi: 10.48550/arxiv.1507.01741 · pith_short_12: 277XE7SQQT5R · pith_short_16: 277XE7SQQT5RZPEX · pith_short_8: 277XE7SQ

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/277XE7SQQT5RZPEXMTRCPCRJJC \
  | 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: d7ff727e5084fb1cbc9764e2278a294899f9ff1b24a99d73f9d596bba93383a5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7ac6c65dbfc0abca0f1576519bd4facc181c0554545d0c6420265a7af6f28bca",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2015-07-07T10:28:46Z",
    "title_canon_sha256": "b5c9785cf8975801c6deb792e86108331bfc170fe7b7405215ca6ba35db31002"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1507.01741",
    "kind": "arxiv",
    "version": 2
  }
}