Pith Number

pith:HYMSZKOB

pith:2015:HYMSZKOB5SK5PPOAVPGZMJHILC

not attested not anchored not stored refs pending

A variational method for quantitative photoacoustic tomography with piecewise constant coefficients

Elena Beretta, Monika Muszkieta, Otmar Scherzer, Wolf Naetar

arxiv:1509.04982 v2 · 2015-09-16 · math.AP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{HYMSZKOB5SK5PPOAVPGZMJHILC}

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	2026-05-18T01:30:48.649647Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3e192ca9c1ec95d7bdc0abcd9624e8589bfcef71e316ebf0f500e19b6822f868

Aliases

arxiv: 1509.04982 · arxiv_version: 1509.04982v2 · doi: 10.48550/arxiv.1509.04982 · pith_short_12: HYMSZKOB5SK5 · pith_short_16: HYMSZKOB5SK5PPOA · pith_short_8: HYMSZKOB

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/HYMSZKOB5SK5PPOAVPGZMJHILC \
  | 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: 3e192ca9c1ec95d7bdc0abcd9624e8589bfcef71e316ebf0f500e19b6822f868

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "173cdd06d868d72948573d4490776bbbd20a31ed6664bf6307be16b7f50ce5ad",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AP",
    "submitted_at": "2015-09-16T17:38:38Z",
    "title_canon_sha256": "21b70bd7c6372d2a444904dce94c1c733d8751f1cbd8f7bcf9f6da340e699499"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1509.04982",
    "kind": "arxiv",
    "version": 2
  }
}