Pith Number

pith:P6DYUHQB

pith:2018:P6DYUHQBIFGVLNQQ65EDOIDO4I

not attested not anchored not stored refs pending

GRIPP: an automated computer-aided design tool for generating 3D printable gradient index acoustic devices

Steven A. Cummer, Yangbo Xie

arxiv:1805.11646 v1 · 2018-05-10 · physics.app-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{P6DYUHQBIFGVLNQQ65EDOIDO4I}

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	2026-05-18T00:14:37.177155Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7f878a1e01414d55b610f74837206ee21d1e05dd6215246fc80c5e33a362c9aa

Aliases

arxiv: 1805.11646 · arxiv_version: 1805.11646v1 · doi: 10.48550/arxiv.1805.11646 · pith_short_12: P6DYUHQBIFGV · pith_short_16: P6DYUHQBIFGVLNQQ · pith_short_8: P6DYUHQB

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/P6DYUHQBIFGVLNQQ65EDOIDO4I \
  | 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: 7f878a1e01414d55b610f74837206ee21d1e05dd6215246fc80c5e33a362c9aa

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "04e0ecbc93ef537d6b90f6ac9a523a3daecf7f16914055473c7da6179f4290fe",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.app-ph",
    "submitted_at": "2018-05-10T12:55:01Z",
    "title_canon_sha256": "52cab4b757e430d0d1754af841c538a1078bce59401e987dcf9817b92d6fb72e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1805.11646",
    "kind": "arxiv",
    "version": 1
  }
}