Pith Number

pith:A372YUHB

pith:2009:A372YUHB5SJQLZOMDOLSOM6XYD

not attested not anchored not stored refs pending

An Active High Impedance Surface for Low Profile Tunable and Steerable Antennas

Agostino Monorchio, Fabio M. Valeri, Filippo Costa, Salvatore Talarico

arxiv:0901.2748 v1 · 2009-01-18 · 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{A372YUHB5SJQLZOMDOLSOM6XYD}

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	2026-05-18T00:57:58.319541Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

06ffac50e1ec9305e5cc1b972733d7c0e5523e6d34192882b61c64389ccb3d78

Aliases

arxiv: 0901.2748 · arxiv_version: 0901.2748v1 · doi: 10.48550/arxiv.0901.2748 · pith_short_12: A372YUHB5SJQ · pith_short_16: A372YUHB5SJQLZOM · pith_short_8: A372YUHB

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/A372YUHB5SJQLZOMDOLSOM6XYD \
  | 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: 06ffac50e1ec9305e5cc1b972733d7c0e5523e6d34192882b61c64389ccb3d78

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ad625d564b37caa71819820f83be657cbad02b4e1043df9fd536538a5687167d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.class-ph",
    "submitted_at": "2009-01-18T23:53:50Z",
    "title_canon_sha256": "63a4fe06cbc5da3db0ee2fa12fba4de7ed91ad076b4e959e51bfe778e6effb06"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0901.2748",
    "kind": "arxiv",
    "version": 1
  }
}