Pith Number

pith:DYAYDZNN

pith:2008:DYAYDZNN3JJM7TJU3YUZQPXHJH

not attested not anchored not stored refs pending

Acoustic Metameterial with Negative Modulus

Choon Mahn Park, Chul Koo Kim, Sam Hyeon Lee, Yong Mun Seo, Zhi Guo Wang

arxiv:0812.2952 v2 · 2008-12-16 · cond-mat.mtrl-sci

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{DYAYDZNN3JJM7TJU3YUZQPXHJH}

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	2026-05-18T02:15:04.707706Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1e0181e5adda52cfcd34de29983ee749d9035fd33e74f73d00852119fd770c43

Aliases

arxiv: 0812.2952 · arxiv_version: 0812.2952v2 · doi: 10.48550/arxiv.0812.2952 · pith_short_12: DYAYDZNN3JJM · pith_short_16: DYAYDZNN3JJM7TJU · pith_short_8: DYAYDZNN

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/DYAYDZNN3JJM7TJU3YUZQPXHJH \
  | 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: 1e0181e5adda52cfcd34de29983ee749d9035fd33e74f73d00852119fd770c43

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "14875936a81b96d3503c23b86fb97f37e922f698a6bfc269400a27bb8f8eefc9",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cond-mat.mtrl-sci",
    "submitted_at": "2008-12-16T01:22:22Z",
    "title_canon_sha256": "2d2dd925979f9efb8e728b161f0ba75fd0471fdf5f58c8220c65984e417dfe5d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0812.2952",
    "kind": "arxiv",
    "version": 2
  }
}