Pith Number

pith:EAIQL5O6

pith:2011:EAIQL5O6GZLQGBQ5SLIU7YBN53

not attested not anchored not stored refs pending

A Space-Optimal Hidden Surface Removal Algorithm for Iso-Oriented Rectangles

Athanasios Tsakalidis, Kostas Tsichlas

arxiv:1109.0389 v1 · 2011-09-02 · cs.CG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{EAIQL5O6GZLQGBQ5SLIU7YBN53}

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	2026-05-18T04:14:15.794545Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

201105f5de365703061d92d14fe02deec3f44b9bbfe3f23d6c68468b2a243c77

Aliases

arxiv: 1109.0389 · arxiv_version: 1109.0389v1 · doi: 10.48550/arxiv.1109.0389 · pith_short_12: EAIQL5O6GZLQ · pith_short_16: EAIQL5O6GZLQGBQ5 · pith_short_8: EAIQL5O6

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/EAIQL5O6GZLQGBQ5SLIU7YBN53 \
  | 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: 201105f5de365703061d92d14fe02deec3f44b9bbfe3f23d6c68468b2a243c77

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "77684b7891883391213f8b4c02c91d12f623358bf9615069ae2225ad5f58dd18",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CG",
    "submitted_at": "2011-09-02T09:16:09Z",
    "title_canon_sha256": "a359b21ae4e2392fd581a728e88c540ce644f604bda7c902137455964feab1b7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1109.0389",
    "kind": "arxiv",
    "version": 1
  }
}