Pith Number

pith:HSLKG7QA

pith:2008:HSLKG7QA2A25VYBQXVHJ3YTIFI

not attested not anchored not stored refs pending

Experiments with moduli of quadrilaterals II

Antti Rasila, Matti Vuorinen

arxiv:0801.4209 v1 · 2008-01-28 · math.NA · cs.NA · math.CV

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{HSLKG7QA2A25VYBQXVHJ3YTIFI}

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	2026-06-03T22:06:04.266580Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3c96a37e00d035dae030bd4e9de2682a33ae40641bd154683693613ad5655b12

Aliases

arxiv: 0801.4209 · arxiv_version: 0801.4209v1 · doi: 10.48550/arxiv.0801.4209 · pith_short_12: HSLKG7QA2A25 · pith_short_16: HSLKG7QA2A25VYBQ · pith_short_8: HSLKG7QA

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/HSLKG7QA2A25VYBQXVHJ3YTIFI \
  | 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: 3c96a37e00d035dae030bd4e9de2682a33ae40641bd154683693613ad5655b12

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f801723b5de90b682ed11c285b13f87738adcbefa36cc45ea42229f8c344a2d9",
    "cross_cats_sorted": [
      "cs.NA",
      "math.CV"
    ],
    "license": "",
    "primary_cat": "math.NA",
    "submitted_at": "2008-01-28T08:41:54Z",
    "title_canon_sha256": "6702dc04de2fa906fbb785e1bb045a6a68d9ce8dae396c98d5592fdb9b27a702"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0801.4209",
    "kind": "arxiv",
    "version": 1
  }
}