Pith Number

pith:2PON5ZQE

pith:2015:2PON5ZQE34I3HRZ74OERPN5ZH5

not attested not anchored not stored refs pending

Origin of Negative Density and Modulus in Acoustic Metamaterials

Oliver B. Wright, Sam Hyeon Lee

arxiv:1509.04094 v7 · 2015-09-14 · physics.class-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{2PON5ZQE34I3HRZ74OERPN5ZH5}

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	2026-05-18T01:22:14.213393Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d3dcdee604df11b3c73fe38917b7b93f539c477ec3507c39ee5075ac077e46dd

Aliases

arxiv: 1509.04094 · arxiv_version: 1509.04094v7 · doi: 10.48550/arxiv.1509.04094 · pith_short_12: 2PON5ZQE34I3 · pith_short_16: 2PON5ZQE34I3HRZ7 · pith_short_8: 2PON5ZQE

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/2PON5ZQE34I3HRZ74OERPN5ZH5 \
  | 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: d3dcdee604df11b3c73fe38917b7b93f539c477ec3507c39ee5075ac077e46dd

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5081a6f7064b77e402cc3ba6f64b04c99beff6da50e9a686f10954e4f2c2058a",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.class-ph",
    "submitted_at": "2015-09-14T13:49:14Z",
    "title_canon_sha256": "d0996e16f1bf1f9ab64f662b7fdda1613cd465810abdd7c055506c603eaedbb2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1509.04094",
    "kind": "arxiv",
    "version": 7
  }
}