Pith Number

pith:KV4VV7P6

pith:2011:KV4VV7P6X3Y3E43G6ZAEXBRJCQ

not attested not anchored not stored refs pending

Improving Christofides' Algorithm for the s-t Path TSP

David B. Shmoys, Hyung-Chan An, Robert Kleinberg

arxiv:1110.4604 v2 · 2011-10-20 · 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{KV4VV7P6X3Y3E43G6ZAEXBRJCQ}

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	2026-05-18T04:09:45.409819Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

55795afdfebef1b27366f6404b8629141860d7ec5eb0279bab04c7ea8866246c

Aliases

arxiv: 1110.4604 · arxiv_version: 1110.4604v2 · doi: 10.48550/arxiv.1110.4604 · pith_short_12: KV4VV7P6X3Y3 · pith_short_16: KV4VV7P6X3Y3E43G · pith_short_8: KV4VV7P6

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/KV4VV7P6X3Y3E43G6ZAEXBRJCQ \
  | 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: 55795afdfebef1b27366f6404b8629141860d7ec5eb0279bab04c7ea8866246c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2f054f9cbf5040dc588415f2b46a4645fd028521ca7f9990a360b50ffce2e044",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2011-10-20T18:50:21Z",
    "title_canon_sha256": "4bfde6271811b3b99c0bea08a4b0ef6972c57cb545f084fea629c9d04b54f61a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1110.4604",
    "kind": "arxiv",
    "version": 2
  }
}