Pith Number

pith:7AFUF7KO

pith:2008:7AFUF7KOBZQNW6SNWA3HLOPAEF

not attested not anchored not stored refs pending

Experimental Demonstration of a Structured Material with Extreme Effective Parameters at Microwaves

C. A. Fernandes, C. R. Medeiros, J. R. Costa, M. G. Silveirinha

arxiv:0810.4597 v1 · 2008-10-25 · 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{7AFUF7KOBZQNW6SNWA3HLOPAEF}

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	2026-05-18T03:55:37.788697Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f80b42fd4e0e60db7a4db03675b9e02174bd1f06e1482b0614df37a6d58ab640

Aliases

arxiv: 0810.4597 · arxiv_version: 0810.4597v1 · doi: 10.48550/arxiv.0810.4597 · pith_short_12: 7AFUF7KOBZQN · pith_short_16: 7AFUF7KOBZQNW6SN · pith_short_8: 7AFUF7KO

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/7AFUF7KOBZQNW6SNWA3HLOPAEF \
  | 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: f80b42fd4e0e60db7a4db03675b9e02174bd1f06e1482b0614df37a6d58ab640

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4424c956c6ba5e6d268376e6ad146d4c3c262baeb7cffb77efd275c711de9ebe",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cond-mat.mtrl-sci",
    "submitted_at": "2008-10-25T13:30:37Z",
    "title_canon_sha256": "ab3cffc71192d11f42221290cc23574e6c7b2dc8d05433d54ff91673164d60d0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0810.4597",
    "kind": "arxiv",
    "version": 1
  }
}