Pith Number

pith:PJFSLFSF

pith:2009:PJFSLFSF5OD4YXBE5SC2K4OMTO

not attested not anchored not stored refs pending

Counterposition and negative phase velocity in uniformly moving dissipative materials

Akhlesh Lakhtakia (Pennsylvania State University), Tom G. Mackay (University of Edinburgh)

arxiv:0905.0176 v1 · 2009-05-02 · 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{PJFSLFSF5OD4YXBE5SC2K4OMTO}

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	2026-05-18T02:13:48.392421Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7a4b259645eb87cc5c24ec85a571cc9ba5a6234145ee85bef4cfd14aa8d1a52f

Aliases

arxiv: 0905.0176 · arxiv_version: 0905.0176v1 · doi: 10.48550/arxiv.0905.0176 · pith_short_12: PJFSLFSF5OD4 · pith_short_16: PJFSLFSF5OD4YXBE · pith_short_8: PJFSLFSF

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/PJFSLFSF5OD4YXBE5SC2K4OMTO \
  | 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: 7a4b259645eb87cc5c24ec85a571cc9ba5a6234145ee85bef4cfd14aa8d1a52f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ee50431c0c9be361d17baf7b77e213d750025f40160e4dbd6427205252cd433d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.optics",
    "submitted_at": "2009-05-02T05:45:02Z",
    "title_canon_sha256": "8eff334c9c0607c587a5b394142351d7dfa18bb1c7e37e3d3fd73c4d70d63767"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0905.0176",
    "kind": "arxiv",
    "version": 1
  }
}