Pith Number

pith:DJWOP3BQ

pith:2019:DJWOP3BQXDSPMYPOVEONJQIZM6

not attested not anchored not stored refs pending

Grid dissections of tangential quadrilaterals

Dan Ismailescu, Erica Choi, Jiho Lee, Joonsoo Lee

arxiv:1908.02251 v1 · 2019-08-06 · 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{DJWOP3BQXDSPMYPOVEONJQIZM6}

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	2026-07-04T23:51:52.408621Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1a6ce7ec30b8e4f661eea91cd4c11967b5608616110b4f85d3a6640e3ba2dbc4

Aliases

arxiv: 1908.02251 · arxiv_version: 1908.02251v1 · doi: 10.48550/arxiv.1908.02251 · pith_short_12: DJWOP3BQXDSP · pith_short_16: DJWOP3BQXDSPMYPO · pith_short_8: DJWOP3BQ

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/DJWOP3BQXDSPMYPOVEONJQIZM6 \
  | 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: 1a6ce7ec30b8e4f661eea91cd4c11967b5608616110b4f85d3a6640e3ba2dbc4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2e5d179e0f08e7074c377d3e24495b4c526c2c68780ded00f7de16eea899b3d5",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.MG",
    "submitted_at": "2019-08-06T16:42:10Z",
    "title_canon_sha256": "f32a4d1a39aba9be66ed6c5beecc7cd89cedb2254f8bfb4faf1714e92c03d2b8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1908.02251",
    "kind": "arxiv",
    "version": 1
  }
}