Pith Number

pith:SCFVWKKG

pith:2019:SCFVWKKGZA6HZMLK5J2WN5RLAW

not attested not anchored not stored refs pending

Angle Covers: Algorithms and Complexity

Alexander Wolff, Ellen Gethner, Jack Spalding-Jamieson, William Evans

arxiv:1911.02040 v2 · 2019-11-05 · cs.CG · cs.CC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{SCFVWKKGZA6HZMLK5J2WN5RLAW}

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	2026-07-05T04:59:56.134751Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

908b5b2946c83c7cb16aea7566f62b05992f8c668d3794fddad5391adc722add

Aliases

arxiv: 1911.02040 · arxiv_version: 1911.02040v2 · doi: 10.48550/arxiv.1911.02040 · pith_short_12: SCFVWKKGZA6H · pith_short_16: SCFVWKKGZA6HZMLK · pith_short_8: SCFVWKKG

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/SCFVWKKGZA6HZMLK5J2WN5RLAW \
  | 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: 908b5b2946c83c7cb16aea7566f62b05992f8c668d3794fddad5391adc722add

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "866ec2c540d399e71379dcd1888b2584b70935447ef60846b370e2641ee818ab",
    "cross_cats_sorted": [
      "cs.CC"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CG",
    "submitted_at": "2019-11-05T19:05:04Z",
    "title_canon_sha256": "f9d7dc219d6daa6f192206c2856623a4ac0d20f0fee3a0f51e29ead122dc4779"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1911.02040",
    "kind": "arxiv",
    "version": 2
  }
}