Pith Number

pith:KDQ2BOSM

pith:2017:KDQ2BOSM4MBRGHUYPNIQKSXXPI

not attested not anchored not stored refs pending

Single freeform surface design for prescribed input wavefront and target irradiance

Christoph B\"osel, Herbert Gross

arxiv:1705.04540 v2 · 2017-05-12 · 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{KDQ2BOSM4MBRGHUYPNIQKSXXPI}

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	2026-05-18T00:38:20.652131Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

50e1a0ba4ce303131e987b51054af77a0ab3b6c852088098ea380e65dbd9c555

Aliases

arxiv: 1705.04540 · arxiv_version: 1705.04540v2 · doi: 10.48550/arxiv.1705.04540 · pith_short_12: KDQ2BOSM4MBR · pith_short_16: KDQ2BOSM4MBRGHUY · pith_short_8: KDQ2BOSM

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/KDQ2BOSM4MBRGHUYPNIQKSXXPI \
  | 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: 50e1a0ba4ce303131e987b51054af77a0ab3b6c852088098ea380e65dbd9c555

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c255c6fd9960723d5e9c1f700580cde6498a3ab76404e399181299fe2f3cd379",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.optics",
    "submitted_at": "2017-05-12T12:34:00Z",
    "title_canon_sha256": "402a41c36312137fa2911ea16c767ced791c821b9589a48ed65a0c71121f005d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1705.04540",
    "kind": "arxiv",
    "version": 2
  }
}