Pith Number

pith:6CYSEQNJ

pith:2011:6CYSEQNJHWHLK5VHJ5ELJ37VMF

not attested not anchored not stored refs pending

On the optimal compression of sets in PSPACE

Marius Zimand

arxiv:1104.2816 v1 · 2011-04-14 · 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{6CYSEQNJHWHLK5VHJ5ELJ37VMF}

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	2026-05-18T04:24:26.774890Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f0b12241a93d8eb576a74f48b4eff561595c1b44d44918570dd16ee5bb02bbcf

Aliases

arxiv: 1104.2816 · arxiv_version: 1104.2816v1 · doi: 10.48550/arxiv.1104.2816 · pith_short_12: 6CYSEQNJHWHL · pith_short_16: 6CYSEQNJHWHLK5VH · pith_short_8: 6CYSEQNJ

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/6CYSEQNJHWHLK5VHJ5ELJ37VMF \
  | 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: f0b12241a93d8eb576a74f48b4eff561595c1b44d44918570dd16ee5bb02bbcf

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f6c1d3683d617187b99d5aca0ec96f55148b9108446f651911095d406443e6b2",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CC",
    "submitted_at": "2011-04-14T16:11:38Z",
    "title_canon_sha256": "b8ec5b821d47408b27b785d66c0cc50dff1eb196d14fd5a0a11d26468ddce40f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1104.2816",
    "kind": "arxiv",
    "version": 1
  }
}