Pith Number

pith:P5DUJY6V

pith:2016:P5DUJY6VB5C7AHVACRSSCPDPIR

not attested not anchored not stored refs pending

Seafloor identification in sonar imagery via simulations of Helmholtz equations and discrete optimization

Bjorn Engquist, Christina Frederick, Haomin Zhou, Quyen Huynh

arxiv:1611.00608 v3 · 2016-10-31 · math.NA · physics.geo-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{P5DUJY6VB5C7AHVACRSSCPDPIR}

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	2026-05-18T00:47:20.498713Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7f4744e3d50f45f01ea01465213c6f447cd8ba1ed849f9b8faaf001e2ccb24ef

Aliases

arxiv: 1611.00608 · arxiv_version: 1611.00608v3 · doi: 10.48550/arxiv.1611.00608 · pith_short_12: P5DUJY6VB5C7 · pith_short_16: P5DUJY6VB5C7AHVA · pith_short_8: P5DUJY6V

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/P5DUJY6VB5C7AHVACRSSCPDPIR \
  | 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: 7f4744e3d50f45f01ea01465213c6f447cd8ba1ed849f9b8faaf001e2ccb24ef

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d5850d4cc6da076d3f23c95f824b4997767fd31f9696eef46399a5dc931267f9",
    "cross_cats_sorted": [
      "physics.geo-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2016-10-31T22:24:47Z",
    "title_canon_sha256": "d74b5a4f871260a3f16191ddb94f27caac130242b8632c4ffcf077c8bee10539"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1611.00608",
    "kind": "arxiv",
    "version": 3
  }
}