Pith Number

pith:VPZBMBGL

pith:2018:VPZBMBGLCPZI5JBYB6W2OLLE7F

not attested not anchored not stored refs pending

Using split-ring resonators to measure the electromagnetic properties of materials: An experiment for senior physics undergraduates

J. S. Bobowski

arxiv:1811.01449 v1 · 2018-11-04 · physics.ed-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{VPZBMBGLCPZI5JBYB6W2OLLE7F}

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	2026-05-18T00:01:34.284415Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

abf21604cb13f28ea4380fada72d64f971573fcc2f324c9ffd1525b38aa3c540

Aliases

arxiv: 1811.01449 · arxiv_version: 1811.01449v1 · doi: 10.48550/arxiv.1811.01449 · pith_short_12: VPZBMBGLCPZI · pith_short_16: VPZBMBGLCPZI5JBY · pith_short_8: VPZBMBGL

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/VPZBMBGLCPZI5JBYB6W2OLLE7F \
  | 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: abf21604cb13f28ea4380fada72d64f971573fcc2f324c9ffd1525b38aa3c540

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a7b9c8530512fd272fafb1f0e7e86a533e0b50852d7c675ffe139e08d89c0342",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.ed-ph",
    "submitted_at": "2018-11-04T22:45:16Z",
    "title_canon_sha256": "9478046aed8bc84719141d46bab46af7ea876334930ebf6d1fa1f77a840e6bf0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1811.01449",
    "kind": "arxiv",
    "version": 1
  }
}