Pith Number

pith:HAVPQRZD

pith:2009:HAVPQRZD4TU6YKENPXSJECGT2X

not attested not anchored not stored refs pending

Inverse Diffusion Theory of Photoacoustics

Guillaume Bal, Gunther Uhlmann

arxiv:0910.2503 v1 · 2009-10-14 · 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{HAVPQRZD4TU6YKENPXSJECGT2X}

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	2026-05-18T02:11:23.899086Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

382af84723e4e9ec288d7de49208d3d5cee6e45f6293c971ec4c180cc3227d85

Aliases

arxiv: 0910.2503 · arxiv_version: 0910.2503v1 · doi: 10.48550/arxiv.0910.2503 · pith_short_12: HAVPQRZD4TU6 · pith_short_16: HAVPQRZD4TU6YKEN · pith_short_8: HAVPQRZD

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/HAVPQRZD4TU6YKENPXSJECGT2X \
  | 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: 382af84723e4e9ec288d7de49208d3d5cee6e45f6293c971ec4c180cc3227d85

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0ca9ff23ad1b008dbdd842e1fa55d12eba7bc1c7d7c0081cf74b53820328c0a2",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AP",
    "submitted_at": "2009-10-14T01:36:03Z",
    "title_canon_sha256": "e8ace2f14f6e8fe92fca6c81993e34e3d8e07d1c6eb1ecfec1ac91c9aad84a79"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0910.2503",
    "kind": "arxiv",
    "version": 1
  }
}