Pith Number

pith:4QCYP2WR

pith:2016:4QCYP2WRJTZAJTSG56MU5M6JVU

not attested not anchored not stored refs pending

Singular Fr\'egier Conics in Non-Euclidean Geometry

Hans-Peter Schr\"ocker

arxiv:1605.07437 v1 · 2016-05-24 · math.MG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{4QCYP2WRJTZAJTSG56MU5M6JVU}

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	2026-05-18T00:09:36.873486Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e40587ead14cf204ce46ef994eb3c9ad1a491b223a89c3ad8b1451a6b3b763c3

Aliases

arxiv: 1605.07437 · arxiv_version: 1605.07437v1 · doi: 10.48550/arxiv.1605.07437 · pith_short_12: 4QCYP2WRJTZA · pith_short_16: 4QCYP2WRJTZAJTSG · pith_short_8: 4QCYP2WR

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/4QCYP2WRJTZAJTSG56MU5M6JVU \
  | 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: e40587ead14cf204ce46ef994eb3c9ad1a491b223a89c3ad8b1451a6b3b763c3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7ab18deae4763fba4c4ca8e7f5320ea62b40cead660264ad454c618bc5d9cdaf",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.MG",
    "submitted_at": "2016-05-24T13:13:56Z",
    "title_canon_sha256": "efb5a2a19e0413595f449973c524c989251891044961938d17aeae8ecb751142"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1605.07437",
    "kind": "arxiv",
    "version": 1
  }
}