Pith Number

pith:3H54RN3U

pith:2019:3H54RN3UYXIB2WWLTMZJQHZPYV

not attested not anchored not stored refs pending

Enhancing SPDC brightness using elliptical pump shapes

Aitor Villar, Alexander Ling, Alexander Lohrmann, Arian Stolk

arxiv:1907.13352 v2 · 2019-07-31 · 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{3H54RN3UYXIB2WWLTMZJQHZPYV}

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	2026-07-05T00:31:54.498128Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d9fbc8b774c5d01d5acb9b32981f2fc5525a8f6c291488c87c52819b8f1fc4cc

Aliases

arxiv: 1907.13352 · arxiv_version: 1907.13352v2 · doi: 10.48550/arxiv.1907.13352 · pith_short_12: 3H54RN3UYXIB · pith_short_16: 3H54RN3UYXIB2WWL · pith_short_8: 3H54RN3U

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/3H54RN3UYXIB2WWLTMZJQHZPYV \
  | 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: d9fbc8b774c5d01d5acb9b32981f2fc5525a8f6c291488c87c52819b8f1fc4cc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "23c919caabc55a7c6c9e88d93b09414d8fee8066057143313107fa865216fad5",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.optics",
    "submitted_at": "2019-07-31T07:46:22Z",
    "title_canon_sha256": "25ae6032ba07e1a7f29a96c68e06e349ff3de63b8c10b3946faad20f3162da8e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1907.13352",
    "kind": "arxiv",
    "version": 2
  }
}