Pith Number

pith:W6Q5SCJ6

pith:2018:W6Q5SCJ6EXGK6RAL5RO3JK3JGJ

not attested not anchored not stored refs pending

The Paulsen Problem Made Simple

Ankur Moitra, Linus Hamilton

arxiv:1809.04726 v2 · 2018-09-13 · math.FA · cs.DS · math.OC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{W6Q5SCJ6EXGK6RAL5RO3JK3JGJ}

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	2026-05-17T23:39:33.376626Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b7a1d9093e25ccaf440bec5db4ab6932717b7c843aacf5aac3908c9413554cb6

Aliases

arxiv: 1809.04726 · arxiv_version: 1809.04726v2 · doi: 10.48550/arxiv.1809.04726 · pith_short_12: W6Q5SCJ6EXGK · pith_short_16: W6Q5SCJ6EXGK6RAL · pith_short_8: W6Q5SCJ6

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/W6Q5SCJ6EXGK6RAL5RO3JK3JGJ \
  | 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: b7a1d9093e25ccaf440bec5db4ab6932717b7c843aacf5aac3908c9413554cb6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5e64486295304a256144bb66e08a405b0d4c52f87cb173d14cf6c4c268e08fea",
    "cross_cats_sorted": [
      "cs.DS",
      "math.OC"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.FA",
    "submitted_at": "2018-09-13T01:05:12Z",
    "title_canon_sha256": "d851e68b28ea2ed2b7ca42ec73df2b76a81507a6ae98713794cdf5601a10b538"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1809.04726",
    "kind": "arxiv",
    "version": 2
  }
}