Pith Number

pith:ZZFJ3J5R

pith:2019:ZZFJ3J5RXS7OL6NAW2CICGHIPK

not attested not anchored not stored refs pending

PPGNet: Learning Point-Pair Graph for Line Segment Detection

Jia Zheng, Jinlei Wang, Kun Huang, Ning Bi, Shenghua Gao, Weixin Luo, Yanyu Xu, Zhengxin Li, Ziheng Zhang

arxiv:1905.03415 v2 · 2019-05-09 · cs.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{ZZFJ3J5RXS7OL6NAW2CICGHIPK}

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	2026-05-17T23:46:02.985860Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ce4a9da7b1bcbee5f9a0b6848118e87a930a15a134742e2378d0dd7010fd4f45

Aliases

arxiv: 1905.03415 · arxiv_version: 1905.03415v2 · doi: 10.48550/arxiv.1905.03415 · pith_short_12: ZZFJ3J5RXS7O · pith_short_16: ZZFJ3J5RXS7OL6NA · pith_short_8: ZZFJ3J5R

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/ZZFJ3J5RXS7OL6NAW2CICGHIPK \
  | 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: ce4a9da7b1bcbee5f9a0b6848118e87a930a15a134742e2378d0dd7010fd4f45

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2ceb30876f2ed635b5c45328189b2953fa3ed892c22e0b6c9c109d241af16cf2",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2019-05-09T02:22:06Z",
    "title_canon_sha256": "a8918cc2dd6ce6c7ec9a601e96bbbf0c0e0d339393ffadbabe51a5ec1d1173c0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1905.03415",
    "kind": "arxiv",
    "version": 2
  }
}