Pith Number

pith:QPFKEVLF

pith:2009:QPFKEVLF3TRCRBGYRC4YHJS32E

not attested not anchored not stored refs pending

Cascaded Nondegenerate Four-Wave Mixing Technique for High-Power Single-Cycle Pulse Synthesis in the Visible and Ultraviolet Ranges

Helder M. Crespo, J. T. Mendonca, Rosa Weigand

arxiv:0904.2720 v1 · 2009-04-17 · 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{QPFKEVLF3TRCRBGYRC4YHJS32E}

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	2026-05-18T02:13:59.449757Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

83caa25565dce22884d888b983a65bd108751281e21887c89f42987b77fb9370

Aliases

arxiv: 0904.2720 · arxiv_version: 0904.2720v1 · doi: 10.48550/arxiv.0904.2720 · pith_short_12: QPFKEVLF3TRC · pith_short_16: QPFKEVLF3TRCRBGY · pith_short_8: QPFKEVLF

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/QPFKEVLF3TRCRBGYRC4YHJS32E \
  | 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: 83caa25565dce22884d888b983a65bd108751281e21887c89f42987b77fb9370

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8ba80055e123ab1cac3490ae2a91b491ed77c468f99b64ffca425b2be30be1be",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.optics",
    "submitted_at": "2009-04-17T15:32:46Z",
    "title_canon_sha256": "3e465209438af8a91090312aeaab2af6c756b14aaaddea86c5166699339f9da8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0904.2720",
    "kind": "arxiv",
    "version": 1
  }
}