Pith Number

pith:IWXP6XH6

pith:2020:IWXP6XH6E7DN2PENMSXY75HI4Y

not attested not anchored not stored refs pending

A Gap-ETH-Tight Approximation Scheme for Euclidean TSP

Jesper Nederlof, Karol W\k{e}grzycki, S\'andor Kisfaludi-Bak

arxiv:2011.03778 v3 · 2020-11-07 · cs.CG · cs.CC · cs.DS

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{IWXP6XH6E7DN2PENMSXY75HI4Y}

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	2026-07-05T09:05:58.429236Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

45aeff5cfe27c6dd3c8d64af8ff4e8e637c243c6009571609b02bac3f25412c4

Aliases

arxiv: 2011.03778 · arxiv_version: 2011.03778v3 · doi: 10.48550/arxiv.2011.03778 · pith_short_12: IWXP6XH6E7DN · pith_short_16: IWXP6XH6E7DN2PEN · pith_short_8: IWXP6XH6

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/IWXP6XH6E7DN2PENMSXY75HI4Y \
  | 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: 45aeff5cfe27c6dd3c8d64af8ff4e8e637c243c6009571609b02bac3f25412c4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "185a7494fae281d828102b2ac7be2ccfb40515b19f202efdba9c5fc2096b7d82",
    "cross_cats_sorted": [
      "cs.CC",
      "cs.DS"
    ],
    "license": "http://creativecommons.org/publicdomain/zero/1.0/",
    "primary_cat": "cs.CG",
    "submitted_at": "2020-11-07T13:50:43Z",
    "title_canon_sha256": "61a05d0557687a185e4b8f469f614be963dbe5961f72d2891be32144ed38e3f9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2011.03778",
    "kind": "arxiv",
    "version": 3
  }
}