Pith Number

pith:SDYU2DE3

pith:2018:SDYU2DE32VUQDK6CWENYHEZSLL

not attested not anchored not stored refs pending

Parameterized Algorithms for Zero Extension and Metric Labelling Problems

Felix Reidl, Magnus Wahlstr\"om

arxiv:1802.06026 v1 · 2018-02-16 · cs.DS · cs.DM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{SDYU2DE32VUQDK6CWENYHEZSLL}

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	2026-05-18T00:23:10.113485Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

90f14d0c9bd56901abc2b11b8393325ad5c0176239ce50fc3cfe3d706d12e141

Aliases

arxiv: 1802.06026 · arxiv_version: 1802.06026v1 · doi: 10.48550/arxiv.1802.06026 · pith_short_12: SDYU2DE32VUQ · pith_short_16: SDYU2DE32VUQDK6C · pith_short_8: SDYU2DE3

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/SDYU2DE32VUQDK6CWENYHEZSLL \
  | 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: 90f14d0c9bd56901abc2b11b8393325ad5c0176239ce50fc3cfe3d706d12e141

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e524fbad1cffa92e883b6821b3159c3a837ab20238daa6c6fc3d51c7a4207155",
    "cross_cats_sorted": [
      "cs.DM"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2018-02-16T16:53:44Z",
    "title_canon_sha256": "d9bd41196cff49f57908e2f3931e09142e78081a585dba56c1870aea0d0e0489"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1802.06026",
    "kind": "arxiv",
    "version": 1
  }
}