Pith Number

pith:2WPXDEGP

pith:2015:2WPXDEGPHKDFF6DDZS3RBQ5GF7

not attested not anchored not stored refs pending

Free Electron Lasers using `Beam by Design'

B.W.J. McNeil, J. R. Henderson, L.T. Campbell

arxiv:1504.06538 v1 · 2015-04-24 · physics.acc-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{2WPXDEGPHKDFF6DDZS3RBQ5GF7}

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	2026-05-18T01:34:23.350989Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d59f7190cf3a8652f863ccb710c3a62fcbb9853be22fea66a65f62e1de087752

Aliases

arxiv: 1504.06538 · arxiv_version: 1504.06538v1 · doi: 10.48550/arxiv.1504.06538 · pith_short_12: 2WPXDEGPHKDF · pith_short_16: 2WPXDEGPHKDFF6DD · pith_short_8: 2WPXDEGP

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/2WPXDEGPHKDFF6DDZS3RBQ5GF7 \
  | 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: d59f7190cf3a8652f863ccb710c3a62fcbb9853be22fea66a65f62e1de087752

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3004ca4828c9608232d7bab70a84ccdde614af43f8404dadeab6e0e7d8c928c7",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.acc-ph",
    "submitted_at": "2015-04-24T15:17:14Z",
    "title_canon_sha256": "d026cee375849f4bf6e62f447ebebaee11fc79904310c63f8bbb7d6f61415186"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1504.06538",
    "kind": "arxiv",
    "version": 1
  }
}