Pith Number

pith:ZYPVWGKR

pith:2011:ZYPVWGKRDKXJVJ2PXRSAGF755K

not attested not anchored not stored refs pending

A New Numerical Algorithm for Thermoacoustic and Photoacoustic Tomography with Variable Sound Speed

Gunther Uhlmann, Hongkai Zhao, Jianliang Qian, Plamen Stefanov

arxiv:1101.3729 v1 · 2011-01-19 · 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{ZYPVWGKRDKXJVJ2PXRSAGF755K}

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	2026-05-18T02:22:51.318415Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ce1f5b19511aae9aa74fbc640317fdeab609ad1a67db23074c2d294ed63b2163

Aliases

arxiv: 1101.3729 · arxiv_version: 1101.3729v1 · doi: 10.48550/arxiv.1101.3729 · pith_short_12: ZYPVWGKRDKXJ · pith_short_16: ZYPVWGKRDKXJVJ2P · pith_short_8: ZYPVWGKR

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/ZYPVWGKRDKXJVJ2PXRSAGF755K \
  | 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: ce1f5b19511aae9aa74fbc640317fdeab609ad1a67db23074c2d294ed63b2163

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "14423979ba5f266e465e0d952450e2d060d9e57671aa7cf1e14af83b5b056204",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2011-01-19T17:08:47Z",
    "title_canon_sha256": "b5f23f2de928ff7a79a0148b70fa1667e02b61a7c40c35066e0e5ee227b0a501"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1101.3729",
    "kind": "arxiv",
    "version": 1
  }
}