Pith Number

pith:RJCBTSRC

pith:2019:RJCBTSRCYQLP4F3MBJWWXZWOBC

not attested not anchored not stored refs pending

Hitting Topological Minor Models in Planar Graphs is Fixed Parameter Tractable

Dimitrios M. Thilikos, Giannos Stamoulis, Petr A. Golovach

arxiv:1907.02919 v4 · 2019-07-05 · cs.DS · math.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{RJCBTSRCYQLP4F3MBJWWXZWOBC}

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	2026-07-05T05:11:33.139764Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8a4419ca22c416fe176c0a6d6be6ce089b929d6d50b591827a05b1b6ea995ec7

Aliases

arxiv: 1907.02919 · arxiv_version: 1907.02919v4 · doi: 10.48550/arxiv.1907.02919 · pith_short_12: RJCBTSRCYQLP · pith_short_16: RJCBTSRCYQLP4F3M · pith_short_8: RJCBTSRC

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/RJCBTSRCYQLP4F3MBJWWXZWOBC \
  | 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: 8a4419ca22c416fe176c0a6d6be6ce089b929d6d50b591827a05b1b6ea995ec7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "79d8c5e0f45995693845de7633b3e9e25039bc35e0fbf94409649747882104f4",
    "cross_cats_sorted": [
      "math.CO"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2019-07-05T16:39:22Z",
    "title_canon_sha256": "35a42cf2b809c07adb8943f8cdbab85a8beb304d0b69c8c623f4fd7ecf4c8f15"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1907.02919",
    "kind": "arxiv",
    "version": 4
  }
}