Pith Number

pith:2YXFEOZK

pith:2009:2YXFEOZKFQABCLG6AEOBGRRUD5

not attested not anchored not stored refs pending

On k-Column Sparse Packing Programs

Aravind Srinivasan, Nikhil Bansal, Nitish Korula, Viswanath Nagarajan

arxiv:0908.2256 v3 · 2009-08-16 · cs.DS

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{2YXFEOZKFQABCLG6AEOBGRRUD5}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more

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	2026-05-18T02:12:33.711941Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d62e523b2a2c00112cde011c1346341f5c3cc30da631abbb7934ca2d48253f25

Aliases

arxiv: 0908.2256 · arxiv_version: 0908.2256v3 · doi: 10.48550/arxiv.0908.2256 · pith_short_12: 2YXFEOZKFQAB · pith_short_16: 2YXFEOZKFQABCLG6 · pith_short_8: 2YXFEOZK

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/2YXFEOZKFQABCLG6AEOBGRRUD5 \
  | 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: d62e523b2a2c00112cde011c1346341f5c3cc30da631abbb7934ca2d48253f25

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a2d287453c7ecb636a6e196cc1e23e536bd11438e089b5f4c748552aed462ddc",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2009-08-16T17:55:03Z",
    "title_canon_sha256": "49f3d7baa27f34adba501665bee4e9e583ad9a3290d6a6dcd9ee3d42ff14fc5d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0908.2256",
    "kind": "arxiv",
    "version": 3
  }
}