Pith Number

pith:VUG4TWPP

pith:2013:VUG4TWPP2JIW72LRCV47MRWM6F

not attested not anchored not stored refs pending

Log-Periodic Dipole Array Antenna as a Chipless Radio-Frequeny Identification (RFID) Tag

Gui Jun Li, Li Jun Jiang, Robert Chris Roberts, Shulabh Gupta

arxiv:1312.6908 v1 · 2013-12-25 · physics.optics

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{VUG4TWPP2JIW72LRCV47MRWM6F}

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	2026-05-18T03:03:46.508095Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ad0dc9d9efd2516fe9711579f646ccf15a7bf1bc111ca535c0e0280aa392352b

Aliases

arxiv: 1312.6908 · arxiv_version: 1312.6908v1 · doi: 10.48550/arxiv.1312.6908 · pith_short_12: VUG4TWPP2JIW · pith_short_16: VUG4TWPP2JIW72LR · pith_short_8: VUG4TWPP

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/VUG4TWPP2JIW72LRCV47MRWM6F \
  | 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: ad0dc9d9efd2516fe9711579f646ccf15a7bf1bc111ca535c0e0280aa392352b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0dfec3429015f286eb2e76ac9199c56335a5db5c76a11e0664138030841b4ce1",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.optics",
    "submitted_at": "2013-12-25T02:06:18Z",
    "title_canon_sha256": "1a2b5d0f88bf32dcb63aa6c601214dba0286449795b4d9eba5e04d8063db1e6e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1312.6908",
    "kind": "arxiv",
    "version": 1
  }
}