Pith Number

pith:2EU3HGM5

pith:2013:2EU3HGM5QNIPB55QUDFW2BX32F

not attested not anchored not stored refs pending

Time reversal for photoacoustic tomography based on the wave equation of Nachman, Smith and Waag

Richard Kowar

arxiv:1309.4657 v1 · 2013-09-18 · math.AP · math-ph · math.MP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{2EU3HGM5QNIPB55QUDFW2BX32F}

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	2026-05-18T02:58:45.707176Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d129b3999d8350f0f7b0a0cb6d06fbd14d9e01bdabe3923c6aa69b9e4b07b7d4

Aliases

arxiv: 1309.4657 · arxiv_version: 1309.4657v1 · doi: 10.48550/arxiv.1309.4657 · pith_short_12: 2EU3HGM5QNIP · pith_short_16: 2EU3HGM5QNIPB55Q · pith_short_8: 2EU3HGM5

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/2EU3HGM5QNIPB55QUDFW2BX32F \
  | 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: d129b3999d8350f0f7b0a0cb6d06fbd14d9e01bdabe3923c6aa69b9e4b07b7d4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ef4ee5ba4537249c9abdc1d91a2b95f1ff75f6d74eec2339cd9a2eaa3fc5fa74",
    "cross_cats_sorted": [
      "math-ph",
      "math.MP"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AP",
    "submitted_at": "2013-09-18T14:25:34Z",
    "title_canon_sha256": "fa85fcbc05b2e9b867c9cf87b7e2134c5175d910f54ac04eeb6d9fa50c5d8258"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1309.4657",
    "kind": "arxiv",
    "version": 1
  }
}