Pith Number

pith:J5GKPUWV

pith:2013:J5GKPUWVYTVR5NQOLDTIIKZDSF

not attested not anchored not stored refs pending

On optimal language compression for sets in PSPACE/poly

Marius Zimand, N.V. Vinodchandran

arxiv:1304.1005 v1 · 2013-04-03 · cs.CC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{J5GKPUWVYTVR5NQOLDTIIKZDSF}

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	2026-05-18T03:29:05.547805Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4f4ca7d2d5c4eb1eb60e58e6842b2391461bcce051577879bfee480863e3d3fb

Aliases

arxiv: 1304.1005 · arxiv_version: 1304.1005v1 · doi: 10.48550/arxiv.1304.1005 · pith_short_12: J5GKPUWVYTVR · pith_short_16: J5GKPUWVYTVR5NQO · pith_short_8: J5GKPUWV

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/J5GKPUWVYTVR5NQOLDTIIKZDSF \
  | 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: 4f4ca7d2d5c4eb1eb60e58e6842b2391461bcce051577879bfee480863e3d3fb

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7307605596a4c505ca1bffaa5ed871c04e71b7254aaf39822be3df32b9fb58d2",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CC",
    "submitted_at": "2013-04-03T16:37:02Z",
    "title_canon_sha256": "9a5f4e20a778f06723328481759cdbf7361d2a1815cd565ac5a5633ef3ee1b96"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1304.1005",
    "kind": "arxiv",
    "version": 1
  }
}