Pith Number

pith:NBERT2RE

pith:2012:NBERT2REG2UDJXBCKL2KSE3U6K

not attested not anchored not stored refs pending

The Elusive Drude-Born-Fedorov Model for Chiral Electromagnetic Media

Henrik Freymond, Rainer Picard

arxiv:1204.5350 v1 · 2012-04-24 · math.AP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{NBERT2REG2UDJXBCKL2KSE3U6K}

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	2026-05-18T03:57:13.457256Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

684919ea2436a834dc2252f4a91374f2a99b794b3e61d652d378cbf41957b050

Aliases

arxiv: 1204.5350 · arxiv_version: 1204.5350v1 · doi: 10.48550/arxiv.1204.5350 · pith_short_12: NBERT2REG2UD · pith_short_16: NBERT2REG2UDJXBC · pith_short_8: NBERT2RE

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/NBERT2REG2UDJXBCKL2KSE3U6K \
  | 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: 684919ea2436a834dc2252f4a91374f2a99b794b3e61d652d378cbf41957b050

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6a7ad493bb442711468128d7ebaf283b08bf7b00cf477c497aa213329e4c6eda",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AP",
    "submitted_at": "2012-04-24T11:58:48Z",
    "title_canon_sha256": "4299ef241d5b3d230dfe07add35ec6de26c3c21589ce260fd50f61a19bf521b2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1204.5350",
    "kind": "arxiv",
    "version": 1
  }
}