Pith Number

pith:Q77XPA5N

pith:2017:Q77XPA5NUDYPPPA4UB7LLTQGXE

not attested not anchored not stored refs pending

Parking cars of different sizes

Alex Happ, Richard Ehrenborg

arxiv:1708.09077 v1 · 2017-08-30 · math.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{Q77XPA5NUDYPPPA4UB7LLTQGXE}

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	2026-05-18T00:36:21.083202Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

87ff7783ada0f0f7bc1ca07eb5ce06b9374986d8a8f49973af074c2eafc3da07

Aliases

arxiv: 1708.09077 · arxiv_version: 1708.09077v1 · doi: 10.48550/arxiv.1708.09077 · pith_short_12: Q77XPA5NUDYP · pith_short_16: Q77XPA5NUDYPPPA4 · pith_short_8: Q77XPA5N

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/Q77XPA5NUDYPPPA4UB7LLTQGXE \
  | 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: 87ff7783ada0f0f7bc1ca07eb5ce06b9374986d8a8f49973af074c2eafc3da07

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d35671713f2839569162ad5405fdce3bc22b7c0d80b9f17abf19443c0e59eb15",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2017-08-30T01:35:48Z",
    "title_canon_sha256": "6acde1060557efa565240fb729200837c092a578bc6f8d02d14df040fe862681"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1708.09077",
    "kind": "arxiv",
    "version": 1
  }
}