Pith Number

pith:PR7VXDHL

pith:2015:PR7VXDHLGY3CQ42C65ELLZAHI5

not attested not anchored not stored refs pending

Lower bounds for approximation schemes for Closest String

Daniel Lokshtanov, Marcin Pilipczuk, Marek Cygan, Micha{\l} Pilipczuk, Saket Saurabh

arxiv:1509.05809 v1 · 2015-09-18 · cs.DS

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

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	2026-05-18T01:32:42.261277Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7c7f5b8ceb3636287342f748b5e407475bcf3611b0e3789138e20f48eeb2f652

Aliases

arxiv: 1509.05809 · arxiv_version: 1509.05809v1 · doi: 10.48550/arxiv.1509.05809 · pith_short_12: PR7VXDHLGY3C · pith_short_16: PR7VXDHLGY3CQ42C · pith_short_8: PR7VXDHL

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/PR7VXDHLGY3CQ42C65ELLZAHI5 \
  | 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: 7c7f5b8ceb3636287342f748b5e407475bcf3611b0e3789138e20f48eeb2f652

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b6224a62f8c25ad63c7ade3022c274dc4c78082e08dc52bac82349abadf43b63",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2015-09-18T21:54:26Z",
    "title_canon_sha256": "0c4785f8105b7a710390fcfb157469db6410f9d0feb2d2c64ef719c30d78cde9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1509.05809",
    "kind": "arxiv",
    "version": 1
  }
}