Pith Number

pith:VVUBZHZ3

pith:2017:VVUBZHZ3KHVXKHI3DT555ZPVEJ

not attested not anchored not stored refs pending

Improved upper bounds in the moving sofa problem

Dan Romik, Yoav Kallus

arxiv:1706.06630 v4 · 2017-06-21 · math.MG · 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{VVUBZHZ3KHVXKHI3DT555ZPVEJ}

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	2026-05-18T00:02:13.485241Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ad681c9f3b51eb751d1b1cfbdee5f52248c85b527331e54ab35c14a1227b4710

Aliases

arxiv: 1706.06630 · arxiv_version: 1706.06630v4 · doi: 10.48550/arxiv.1706.06630 · pith_short_12: VVUBZHZ3KHVX · pith_short_16: VVUBZHZ3KHVXKHI3 · pith_short_8: VVUBZHZ3

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/VVUBZHZ3KHVXKHI3DT555ZPVEJ \
  | 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: ad681c9f3b51eb751d1b1cfbdee5f52248c85b527331e54ab35c14a1227b4710

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ca183407f965ae8a5ec4f9574f4e3e3c91eb84f07ea5a06ea64c764642a3d687",
    "cross_cats_sorted": [
      "math.OC"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.MG",
    "submitted_at": "2017-06-21T14:15:51Z",
    "title_canon_sha256": "d57bb36419eb5185391feaea9b8abc2074bd982ee9c822722451e6f861c480b0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1706.06630",
    "kind": "arxiv",
    "version": 4
  }
}