Pith Number

pith:57B4KA7G

pith:2013:57B4KA7GOLYMJE7JOGE5JJWTS2

not attested not anchored not stored refs pending

Positive-energy D-bar method for acoustic tomography: a computational study

Janne P. Tamminen, Maarten de Hoop, Matteo Santacesaria, Matti Lassas, Samuli Siltanen

arxiv:1307.2037 v2 · 2013-07-08 · 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{57B4KA7GOLYMJE7JOGE5JJWTS2}

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	2026-05-18T01:21:32.901407Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

efc3c503e672f0c493e97189d4a6d3968e70553f7080f6ae7e4a1b50baaad580

Aliases

arxiv: 1307.2037 · arxiv_version: 1307.2037v2 · doi: 10.48550/arxiv.1307.2037 · pith_short_12: 57B4KA7GOLYM · pith_short_16: 57B4KA7GOLYMJE7J · pith_short_8: 57B4KA7G

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/57B4KA7GOLYMJE7JOGE5JJWTS2 \
  | 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: efc3c503e672f0c493e97189d4a6d3968e70553f7080f6ae7e4a1b50baaad580

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3bcbca5ab4b0a7ef3b1624e38c10a015c2c39c470c9463833ab423ac7f332263",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2013-07-08T11:08:13Z",
    "title_canon_sha256": "52ab24bcba0cc7ce506f8e6c531dc5b573270d075f72a565965fd5f8a323b88d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1307.2037",
    "kind": "arxiv",
    "version": 2
  }
}