Pith Number

pith:YER2PM4H

pith:2013:YER2PM4HS5A224BU5VZZFQZ67Q

not attested not anchored not stored refs pending

Isoptic curves of conic sections in constant curvature geometries

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

arxiv:1301.6991 v2 · 2013-01-29 · math.GT · 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{YER2PM4HS5A224BU5VZZFQZ67Q}

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	2026-05-18T03:35:01.421395Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c123a7b3879741ad7034ed7392c33efc1a58ef33748c17c0789654ac43f9746d

Aliases

arxiv: 1301.6991 · arxiv_version: 1301.6991v2 · doi: 10.48550/arxiv.1301.6991 · pith_short_12: YER2PM4HS5A2 · pith_short_16: YER2PM4HS5A224BU · pith_short_8: YER2PM4H

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/YER2PM4HS5A224BU5VZZFQZ67Q \
  | 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: c123a7b3879741ad7034ed7392c33efc1a58ef33748c17c0789654ac43f9746d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3a9a6928c7ac2c6012065ffcedad3db66e657bf437040acfc51de7ce69092a0b",
    "cross_cats_sorted": [
      "math.MG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.GT",
    "submitted_at": "2013-01-29T17:16:14Z",
    "title_canon_sha256": "e64eb8afa93367cf77097261fb1f481f08d98cccd0ea2566f1a9d3475fd92c87"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1301.6991",
    "kind": "arxiv",
    "version": 2
  }
}