Pith Number

pith:CQ7UYP4U

pith:2009:CQ7UYP4UWIHO3GSFOOBPVZVCJ2

not attested not anchored not stored refs pending

Achieving Invisibility of Homogeneous Radially Anisotropic Cylinders by Effective Medium Theory

Cheng-Wei Qiu, Lei Gao, Yaxian Ni

arxiv:0905.1503 v2 · 2009-05-10 · 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{CQ7UYP4UWIHO3GSFOOBPVZVCJ2}

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	2026-05-18T04:28:20.499496Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

143f4c3f94b20eed9a457382fae6a24e8a4013f0a88994af578677bafb8cfa6b

Aliases

arxiv: 0905.1503 · arxiv_version: 0905.1503v2 · doi: 10.48550/arxiv.0905.1503 · pith_short_12: CQ7UYP4UWIHO · pith_short_16: CQ7UYP4UWIHO3GSF · pith_short_8: CQ7UYP4U

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/CQ7UYP4UWIHO3GSFOOBPVZVCJ2 \
  | 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: 143f4c3f94b20eed9a457382fae6a24e8a4013f0a88994af578677bafb8cfa6b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0f92149a0adda3b3bcff52b0b86c16600034022249edcb0817d4dc0ee73127cc",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.optics",
    "submitted_at": "2009-05-10T20:17:42Z",
    "title_canon_sha256": "8deed3b59357766923f5eab7d0c21f58b83bb5132512e0e5a8ecfb1f434f9768"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0905.1503",
    "kind": "arxiv",
    "version": 2
  }
}