Pith Number

pith:K4VNXLWM

pith:2016:K4VNXLWMCPDMGCJF7C7XWLLR25

not attested not anchored not stored refs pending

Orthogonal basis with a conicoid first mode for shape specification of optical surfaces

Chelo Ferreira, Ester Perez Sinusia, Jose L. Lopez, Rafael Navarro

arxiv:1606.06327 v2 · 2016-06-17 · math.NA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{K4VNXLWMCPDMGCJF7C7XWLLR25}

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	2026-05-18T01:04:53.466862Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

572adbaecc13c6c30925f8bf7b2d71d763dc187bdd9422bedc6d20fa1085429b

Aliases

arxiv: 1606.06327 · arxiv_version: 1606.06327v2 · doi: 10.48550/arxiv.1606.06327 · pith_short_12: K4VNXLWMCPDM · pith_short_16: K4VNXLWMCPDMGCJF · pith_short_8: K4VNXLWM

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/K4VNXLWMCPDMGCJF7C7XWLLR25 \
  | 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: 572adbaecc13c6c30925f8bf7b2d71d763dc187bdd9422bedc6d20fa1085429b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d802f0079a6ba2e5a26852455bee52a799ce2257c8b8d6068cfbbd755156b118",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2016-06-17T14:09:02Z",
    "title_canon_sha256": "7f969db5e25bc0f1e7e0bd51486b277b3fbaec0c1cbe7ff18f464107f86486af"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1606.06327",
    "kind": "arxiv",
    "version": 2
  }
}