Pith Number

pith:SQ6KFZCG

pith:2008:SQ6KFZCGX2QL27ZTPOGJA64JFX

not attested not anchored not stored refs pending

Negative Group Velocity from Quadrupole Resonance of Plasmonic Spheres

C. T. Chan, Dezhuan Han, Kin Hung Fung, Yun Lai, Zhao-Qing Zhang

arxiv:0812.2717 v1 · 2008-12-15 · 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{SQ6KFZCGX2QL27ZTPOGJA64JFX}

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	2026-05-18T02:50:52.263938Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

943ca2e446bea0bd7f337b8c907b892dcb2521b6d00022f518bb21e8502eac38

Aliases

arxiv: 0812.2717 · arxiv_version: 0812.2717v1 · doi: 10.48550/arxiv.0812.2717 · pith_short_12: SQ6KFZCGX2QL · pith_short_16: SQ6KFZCGX2QL27ZT · pith_short_8: SQ6KFZCG

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/SQ6KFZCGX2QL27ZTPOGJA64JFX \
  | 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: 943ca2e446bea0bd7f337b8c907b892dcb2521b6d00022f518bb21e8502eac38

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f30bce863767c650ec5d0944ae1cd4a335850182c98b0b9e3feee2ea1228a1ac",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.optics",
    "submitted_at": "2008-12-15T03:50:16Z",
    "title_canon_sha256": "6461a1ea115ec0f67c132d6f33e74d772cf611328cd17e8cdbebcd5693477409"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0812.2717",
    "kind": "arxiv",
    "version": 1
  }
}