Pith Number

pith:KE25DK2C

pith:2015:KE25DK2CNUFI67L7RRRQGP7DA7

not attested not anchored not stored refs pending

Isoptic curves of generalized conic sections in the hyperbolic plane

G\'eza Csima, Jen\H{o} Szirmai

arxiv:1504.06450 v1 · 2015-04-24 · 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{KE25DK2CNUFI67L7RRRQGP7DA7}

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	2026-05-18T02:17:53.578702Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5135d1ab426d0a8f7d7f8c63033fe307d2ea7219d333f138ffc323c6594b87cd

Aliases

arxiv: 1504.06450 · arxiv_version: 1504.06450v1 · doi: 10.48550/arxiv.1504.06450 · pith_short_12: KE25DK2CNUFI · pith_short_16: KE25DK2CNUFI67L7 · pith_short_8: KE25DK2C

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/KE25DK2CNUFI67L7RRRQGP7DA7 \
  | 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: 5135d1ab426d0a8f7d7f8c63033fe307d2ea7219d333f138ffc323c6594b87cd

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2a439152dd658a7320a9fcebf755d012e6582cdf029f47d2309023dc7a7cdb7a",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.MG",
    "submitted_at": "2015-04-24T10:01:04Z",
    "title_canon_sha256": "24799511d0cbf2442aaa83d681c67f67c20a303b87f6c0d6cc5e9e555deb0317"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1504.06450",
    "kind": "arxiv",
    "version": 1
  }
}