Pith Number

pith:WH4HEWQF

pith:2011:WH4HEWQF4BR3CC5BWTAPDEJ2BQ

not attested not anchored not stored refs pending

On Approximability of Block Sorting

N. S. Narayanaswamy, Swapnoneel Roy

arxiv:1110.0892 v1 · 2011-10-05 · 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{WH4HEWQF4BR3CC5BWTAPDEJ2BQ}

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	2026-05-18T04:11:40.226504Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b1f8725a05e063b10ba1b4c0f1913a0c12135de6081d8c800591c2c7ea865301

Aliases

arxiv: 1110.0892 · arxiv_version: 1110.0892v1 · doi: 10.48550/arxiv.1110.0892 · pith_short_12: WH4HEWQF4BR3 · pith_short_16: WH4HEWQF4BR3CC5B · pith_short_8: WH4HEWQF

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/WH4HEWQF4BR3CC5BWTAPDEJ2BQ \
  | 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: b1f8725a05e063b10ba1b4c0f1913a0c12135de6081d8c800591c2c7ea865301

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2ec2f2612d890d70b6a3a56f35c7b8e073463b4e1d6b5f26a2be762b20dd7e65",
    "cross_cats_sorted": [
      "cs.DS"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CC",
    "submitted_at": "2011-10-05T04:12:09Z",
    "title_canon_sha256": "70ec4446a3f34871803ad563bbea0ba7bfbeef7806e3146803f4f72ec6801408"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1110.0892",
    "kind": "arxiv",
    "version": 1
  }
}